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  3. Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?

Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?

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  • L Larson

    @NeverDie In Eagle, I found that the auto-router gives no joy. Seems to be that the art of the board is best done manually.

    I'm just now looking at one board (DRF1262TG) in OSH Park that I've uploades. The view is much better than looking at the *.svg files. The radio pads look like even I can hit them with solder. Gave me a better feel. Golden age... thank you again.

    NeverDieN Offline
    NeverDieN Offline
    NeverDie
    Hero Member
    wrote on last edited by
    #201

    @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

    @NeverDie The radio pads look like even I can hit them with solder.

    When I'm designing module PCB landing pads, I almost always make them longer than what the datasheet recommends to make orienting the module and soldering it in place easier. In contrast, the datasheet always specifies the absolute minimum.

    1 Reply Last reply
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    • NeverDieN NeverDie

      @Larson This time using female headers, I built a new platform and Ebyte adapter, as discussed earlier.
      ppk2_rigging.JPG
      I expect this version will be fully Dupont compatible with the PPK2 probe pins. Unfortunately, if you look carefully you'll see that the adapter PCB covers up the nearest header pin hole beneath it on either side of the board. Ooops! I'll have to fix that in the next revision of the adapter board. For now it's no biggy, though: it's PPK2 access to the pins on the adapter board that matter most, and those are now fully exposed for probing.

      L Offline
      L Offline
      Larson
      wrote on last edited by
      #202

      @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

      if you look carefully you'll see that the adapter PCB covers up the nearest header pin hole beneath it on either side of the board.

      Yea, but a Dremmel snip job would have those two pins accessible in a flash! In my hackish world, there has to be three errors to warrant redsign... unless it is an unrecoverable error, of course!

      1 Reply Last reply
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      • NeverDieN Offline
        NeverDieN Offline
        NeverDie
        Hero Member
        wrote on last edited by NeverDie
        #203

        @Larson Are you able to get input to work on any of the 8 PPK2 sense pins? Mine isn't responding at all. They all read high, even if I connect one of them directly to PPK2 ground. Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin. If yours is working, then maybe mine is defective or something.

        Where were you able to get yours from? The place I ordered from no longer has them in stock. I'm debating whether to backorder from mouser. Argh. I hope it doesn't come to that. Weird that the current portion of the PPK2 is working, but not the logic analyzer part.

        I've submitted a ticket to Nordic and contacted the seller, but of course nothing happens very quickly and I probably won't hear from them anytime soon.

        L 2 Replies Last reply
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        • NeverDieN NeverDie

          @Larson Are you able to get input to work on any of the 8 PPK2 sense pins? Mine isn't responding at all. They all read high, even if I connect one of them directly to PPK2 ground. Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin. If yours is working, then maybe mine is defective or something.

          Where were you able to get yours from? The place I ordered from no longer has them in stock. I'm debating whether to backorder from mouser. Argh. I hope it doesn't come to that. Weird that the current portion of the PPK2 is working, but not the logic analyzer part.

          I've submitted a ticket to Nordic and contacted the seller, but of course nothing happens very quickly and I probably won't hear from them anytime soon.

          L Offline
          L Offline
          Larson
          wrote on last edited by
          #204

          @NeverDie The PPKII arrived yesterday! I've only cracked it out of the box and haven't tried. I'll do so next. Been spending my time in KiCAD tutorials, looking at your boards and taking care of family! I'm like an excited dog in a 3-D field of fire-hydrants! Never enough time for a slow-reader like me.

          My PPKII source: DigiKey 5/24/22 order. Here is the scoop off the invoice (most importantly the part no): PART: 1490-NRF-PPK2-ND MFG : NORDIC SEMICONDUCTOR ASA / NRF-PPK2 DESC: POWER PROFILER KIT 92.50000 92.50 COO : POLAND ECCN: EAR99 HTSUS: 8543.70.9860 ROHS3 COMP REACH UNAFFECTED 25-JUN-2020
          It sure came fast for being back-ordered.

          I also received a bunch of other solder stuff you recommended and a solder plate. Again, too excited, but life is getting in the way. Radio’s are on their way, mostly from AliExpress. Too bad they fractionalize one order; now I’ve got about a dozen different order-tracking email threads.

          PPKII test: I’m planning on a vanilla ProMini with and without the conventional crystal – per your tutorial. I will throw in a signal cue on a pin to test the logic analyzer thing. Will that be sufficient to test? Hope to report by the end of the week if the distractions end.

          Then I’d like to try the PPKII on the Darrah Trig Board; I know, I can’t read the deep sleep with a PPK, but it will be a good first-try for me with the Trig Board.

          NeverDieN 1 Reply Last reply
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          • NeverDieN NeverDie

            @Larson Are you able to get input to work on any of the 8 PPK2 sense pins? Mine isn't responding at all. They all read high, even if I connect one of them directly to PPK2 ground. Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin. If yours is working, then maybe mine is defective or something.

            Where were you able to get yours from? The place I ordered from no longer has them in stock. I'm debating whether to backorder from mouser. Argh. I hope it doesn't come to that. Weird that the current portion of the PPK2 is working, but not the logic analyzer part.

            I've submitted a ticket to Nordic and contacted the seller, but of course nothing happens very quickly and I probably won't hear from them anytime soon.

            L Offline
            L Offline
            Larson
            wrote on last edited by Larson
            #205

            @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

            Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin.

            Maybe a stupid question... but are you powering from the PPKII source, or the device-under-test battery? Does it matter? I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII. I have no idea if the LA is complicated by this.

            NeverDieN 1 Reply Last reply
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            • L Larson

              @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

              Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin.

              Maybe a stupid question... but are you powering from the PPKII source, or the device-under-test battery? Does it matter? I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII. I have no idea if the LA is complicated by this.

              NeverDieN Offline
              NeverDieN Offline
              NeverDie
              Hero Member
              wrote on last edited by
              #206

              @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

              @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

              Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin.

              Maybe a stupid question... but are you powering from the PPKII source, or the device-under-test battery? Does it matter? I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII. I have no idea if the LA is complicated by this.

              I've tried it both ways, and I'm just not getting anything out of the logic port.

              L 1 Reply Last reply
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              • L Larson

                @NeverDie The PPKII arrived yesterday! I've only cracked it out of the box and haven't tried. I'll do so next. Been spending my time in KiCAD tutorials, looking at your boards and taking care of family! I'm like an excited dog in a 3-D field of fire-hydrants! Never enough time for a slow-reader like me.

                My PPKII source: DigiKey 5/24/22 order. Here is the scoop off the invoice (most importantly the part no): PART: 1490-NRF-PPK2-ND MFG : NORDIC SEMICONDUCTOR ASA / NRF-PPK2 DESC: POWER PROFILER KIT 92.50000 92.50 COO : POLAND ECCN: EAR99 HTSUS: 8543.70.9860 ROHS3 COMP REACH UNAFFECTED 25-JUN-2020
                It sure came fast for being back-ordered.

                I also received a bunch of other solder stuff you recommended and a solder plate. Again, too excited, but life is getting in the way. Radio’s are on their way, mostly from AliExpress. Too bad they fractionalize one order; now I’ve got about a dozen different order-tracking email threads.

                PPKII test: I’m planning on a vanilla ProMini with and without the conventional crystal – per your tutorial. I will throw in a signal cue on a pin to test the logic analyzer thing. Will that be sufficient to test? Hope to report by the end of the week if the distractions end.

                Then I’d like to try the PPKII on the Darrah Trig Board; I know, I can’t read the deep sleep with a PPK, but it will be a good first-try for me with the Trig Board.

                NeverDieN Offline
                NeverDieN Offline
                NeverDie
                Hero Member
                wrote on last edited by
                #207

                @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                Will that be sufficient to test? Hope to report by the end of the week if the distractions end.

                I imagine so.

                1 Reply Last reply
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                • NeverDieN NeverDie

                  @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                  @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                  Matter of fact, I'm not even getting any voltage out of the logic analyzer's VCC pin.

                  Maybe a stupid question... but are you powering from the PPKII source, or the device-under-test battery? Does it matter? I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII. I have no idea if the LA is complicated by this.

                  I've tried it both ways, and I'm just not getting anything out of the logic port.

                  L Offline
                  L Offline
                  Larson
                  wrote on last edited by
                  #208

                  @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                  I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII.

                  And, I think I learned about the PPKII burden voltage from you!

                  NeverDieN 1 Reply Last reply
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                  • L Larson

                    @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                    I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII.

                    And, I think I learned about the PPKII burden voltage from you!

                    NeverDieN Offline
                    NeverDieN Offline
                    NeverDie
                    Hero Member
                    wrote on last edited by NeverDie
                    #209

                    @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                    @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                    I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII.

                    And, I think I learned about the PPKII burden voltage from you!

                    The PPK2 seems to work fine when powering the circuit whose current it is measuring, but if externally powered then, yes, for some reason it seems to choke the DUT.

                    Because the PPK2 is out-of-stock everywhere, I decided that rather than be held prisoner by whatever lengthy return/warranty cycle for my PPK2 is likely to be, I would upgrade my o-scope to one that can do integrations and sell my old scope, which can't do integrations. New scope should arrive on Thursday.

                    If you're wondering how that works, this explains it:
                    EEVblog #662- How & Why to use Integration on an Oscilloscope – 19:53
                    — EEVblog

                    As you can see, the UI is nowhere near as nice as the PPK2 for measuring current consumption. Perhaps offsetting that somewhat is that the o-scopes resolution should be better: the PPK2 has 100,000 samples per second, whereas these days a decent entry-level o-scope will commonly have 1 giga-samples/second.

                    I still like the PPK2, and I look forward to exchanging the one I have for one that works.

                    L 1 Reply Last reply
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                    • NeverDieN NeverDie

                      @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                      @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                      I know nothing about the PPKII, yet. But I have read that the burden voltage is an issue even on the PPKII.

                      And, I think I learned about the PPKII burden voltage from you!

                      The PPK2 seems to work fine when powering the circuit whose current it is measuring, but if externally powered then, yes, for some reason it seems to choke the DUT.

                      Because the PPK2 is out-of-stock everywhere, I decided that rather than be held prisoner by whatever lengthy return/warranty cycle for my PPK2 is likely to be, I would upgrade my o-scope to one that can do integrations and sell my old scope, which can't do integrations. New scope should arrive on Thursday.

                      If you're wondering how that works, this explains it:
                      EEVblog #662- How & Why to use Integration on an Oscilloscope – 19:53
                      — EEVblog

                      As you can see, the UI is nowhere near as nice as the PPK2 for measuring current consumption. Perhaps offsetting that somewhat is that the o-scopes resolution should be better: the PPK2 has 100,000 samples per second, whereas these days a decent entry-level o-scope will commonly have 1 giga-samples/second.

                      I still like the PPK2, and I look forward to exchanging the one I have for one that works.

                      L Offline
                      L Offline
                      Larson
                      wrote on last edited by
                      #210

                      @NeverDie I have no experience with an O. Scope, or a PPKII. I presumed the OS gives one much more dimension of analysis. But as indicated my Harbor Freights DMM delivers nearly everything I need. Sure is fun to listen to Dave Jones. The man is a source of knowledge and excitement spiced with humor.

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                      • NeverDieN Offline
                        NeverDieN Offline
                        NeverDie
                        Hero Member
                        wrote on last edited by NeverDie
                        #211

                        Good news! My PPK2 works after all. After experimenting, I determined that '"VCC" on the logic port is not a voltage source, as its name would imply. Instead, it is a voltage sense pin. So.... the way to make the logic port work is to wire the logic port VCC to the VOUT (or to whatever VCC that's powering your project). After doing so, D0 through D7 work as you would expect.

                        Also worthy of note: there evidently are no internal pull-up or pull-down resistors on any of the D0-D7 logic port sense pins. So, if, for example, you give D0 a high pulse and then disconnect from it, D0 will tend to stay high until it receive a low pulse.

                        Happy I don't need to return/exchange the PPK2 after all. :-)

                        L 1 Reply Last reply
                        1
                        • NeverDieN Offline
                          NeverDieN Offline
                          NeverDie
                          Hero Member
                          wrote on last edited by
                          #212

                          @Larson Something I only just recently started using in the last couple of days that you may like: 0.4mm diameter Kester Rosin solder. It's ridiculously thin, but for soldering radio modules onto boards, I'm finding that I can more precisely put just enough solder exactly where I want it without having to apply solder flux to the module afterward.

                          L 2 Replies Last reply
                          1
                          • NeverDieN NeverDie

                            Good news! My PPK2 works after all. After experimenting, I determined that '"VCC" on the logic port is not a voltage source, as its name would imply. Instead, it is a voltage sense pin. So.... the way to make the logic port work is to wire the logic port VCC to the VOUT (or to whatever VCC that's powering your project). After doing so, D0 through D7 work as you would expect.

                            Also worthy of note: there evidently are no internal pull-up or pull-down resistors on any of the D0-D7 logic port sense pins. So, if, for example, you give D0 a high pulse and then disconnect from it, D0 will tend to stay high until it receive a low pulse.

                            Happy I don't need to return/exchange the PPK2 after all. :-)

                            L Offline
                            L Offline
                            Larson
                            wrote on last edited by
                            #213

                            @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                            Glad to hear you solved it. I was hoping to help you, for a change. You are too fast for me. I just got home from a grueling day.

                            So, if, for example, you give D0 a high pulse and then disconnect from it, D0 will tend to stay high until it receive a low pulse.

                            By 'disconnect' do you mean sleeping? It sounds like Pull-Up/Down on the DUT pin would solve it. Ohhh, I'm thinking that disconnect means when the MCU disengages the PPKII. Or perhaps VCC pin is at play. I know so little of the PPKII, but I would imagine it couldn't have any Pull-Up/Down assignments or it would be fighting the DUT Pull direction. The result of double pulls would be a voltage divider and give some misleading indications.

                            NeverDieN 1 Reply Last reply
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                            • L Larson

                              @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                              Glad to hear you solved it. I was hoping to help you, for a change. You are too fast for me. I just got home from a grueling day.

                              So, if, for example, you give D0 a high pulse and then disconnect from it, D0 will tend to stay high until it receive a low pulse.

                              By 'disconnect' do you mean sleeping? It sounds like Pull-Up/Down on the DUT pin would solve it. Ohhh, I'm thinking that disconnect means when the MCU disengages the PPKII. Or perhaps VCC pin is at play. I know so little of the PPKII, but I would imagine it couldn't have any Pull-Up/Down assignments or it would be fighting the DUT Pull direction. The result of double pulls would be a voltage divider and give some misleading indications.

                              NeverDieN Offline
                              NeverDieN Offline
                              NeverDie
                              Hero Member
                              wrote on last edited by NeverDie
                              #214

                              @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                              @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                              Glad to hear you solved it. I was hoping to help you, for a change. You are too fast for me. I just got home from a grueling day.

                              So, if, for example, you give D0 a high pulse and then disconnect from it, D0 will tend to stay high until it receive a low pulse.

                              By 'disconnect' do you mean sleeping? It sounds like Pull-Up/Down on the DUT pin would solve it. Ohhh, I'm thinking that disconnect means when the MCU disengages the PPKII. Or perhaps VCC pin is at play. I know so little of the PPKII, but I would imagine it couldn't have any Pull-Up/Down assignments or it would be fighting the DUT Pull direction. The result of double pulls would be a voltage divider and give some misleading indications.

                              By disconnect I just mean, for example, taking a wire that's connected to D0 and touching it to GND and then pulling the wire away so that it's no longer touching GND. It's not something you would do "in real life," but I was doing it just to confirm that the PPK2 was working.

                              1 Reply Last reply
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                              • NeverDieN NeverDie

                                @Larson Something I only just recently started using in the last couple of days that you may like: 0.4mm diameter Kester Rosin solder. It's ridiculously thin, but for soldering radio modules onto boards, I'm finding that I can more precisely put just enough solder exactly where I want it without having to apply solder flux to the module afterward.

                                L Offline
                                L Offline
                                Larson
                                wrote on last edited by
                                #215

                                @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                0.4mm diameter Kester Rosin solder.

                                I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                NeverDieN L 2 Replies Last reply
                                0
                                • L Larson

                                  @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                  0.4mm diameter Kester Rosin solder.

                                  I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                  NeverDieN Offline
                                  NeverDieN Offline
                                  NeverDie
                                  Hero Member
                                  wrote on last edited by NeverDie
                                  #216

                                  @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                  @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                  0.4mm diameter Kester Rosin solder.

                                  I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                  Yeah, I was using 0.635mm MG Chemicals solder previously, but I found I had to drown the radio modules in rosin flux afterward to eliminate solder bridges, etc. Perhaps part of the difference may be that Kester uses a different formulation for its in-line flux than MG Chemicals? I suppose that could also have something to do with it. So, maybe it's not entirely diameter, but having now worked with the two different diameters, my gut intuition is that the smaller diameter is helping.

                                  Anyone else reading this having any opinions on the matter that they are willing to share?

                                  L A 2 Replies Last reply
                                  1
                                  • L Larson

                                    @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                    0.4mm diameter Kester Rosin solder.

                                    I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                    L Offline
                                    L Offline
                                    Larson
                                    wrote on last edited by
                                    #217

                                    @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                    I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away.

                                    Ha, I just did the simple math. Since the cross-sectional area is function of the squared radius, 0.4 is vastly different (better?) than the 0.6 mm. The 0.4 mm will feed 2.25 times as fast as the 0.6 mm for the same volume - maybe even more if there is a higher evaporative flux component. That is a big difference.

                                    1 Reply Last reply
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                                    • NeverDieN NeverDie

                                      @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                      @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                      0.4mm diameter Kester Rosin solder.

                                      I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                      Yeah, I was using 0.635mm MG Chemicals solder previously, but I found I had to drown the radio modules in rosin flux afterward to eliminate solder bridges, etc. Perhaps part of the difference may be that Kester uses a different formulation for its in-line flux than MG Chemicals? I suppose that could also have something to do with it. So, maybe it's not entirely diameter, but having now worked with the two different diameters, my gut intuition is that the smaller diameter is helping.

                                      Anyone else reading this having any opinions on the matter that they are willing to share?

                                      L Offline
                                      L Offline
                                      Larson
                                      wrote on last edited by Larson
                                      #218

                                      @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                      Anyone else reading this having any opinions on the matter that they are willing to share?

                                      I'm sure there are. Initially, I was not only occasional but also reluctant to comment due to my lack of credible contribution. You helped me overcome that. This thread will be a resource for a multitude of others that will be too late for contemporary comment. Keep on going, man.

                                      Today's achievement for me: PPK2 software is loaded (not that simple) and it is funcitoning. Super cool metrics. I'll shortly post my crystal/non-crystal measurements for my own enjoyment.

                                      1 Reply Last reply
                                      1
                                      • NeverDieN NeverDie

                                        @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                        @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                        0.4mm diameter Kester Rosin solder.

                                        I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                        Yeah, I was using 0.635mm MG Chemicals solder previously, but I found I had to drown the radio modules in rosin flux afterward to eliminate solder bridges, etc. Perhaps part of the difference may be that Kester uses a different formulation for its in-line flux than MG Chemicals? I suppose that could also have something to do with it. So, maybe it's not entirely diameter, but having now worked with the two different diameters, my gut intuition is that the smaller diameter is helping.

                                        Anyone else reading this having any opinions on the matter that they are willing to share?

                                        A Offline
                                        A Offline
                                        alphaHotel
                                        wrote on last edited by
                                        #219

                                        @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                        @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                        @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                        0.4mm diameter Kester Rosin solder.

                                        I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                        Yeah, I was using 0.635mm MG Chemicals solder previously, but I found I had to drown the radio modules in rosin flux afterward to eliminate solder bridges, etc. Perhaps part of the difference may be that Kester uses a different formulation for its in-line flux than MG Chemicals? I suppose that could also have something to do with it. So, maybe it's not entirely diameter, but having now worked with the two different diameters, my gut intuition is that the smaller diameter is helping.

                                        Anyone else reading this having any opinions on the matter that they are willing to share?

                                        I swear by the stuff in the picture below. It melts at a lower temperature(179 C) so, as an amateur, I feel safer keeping my iron at a lower temp and in place a little longer when I am working with IC's. I like that it's thin too as it is easier to control how much you apply. I have no issues with it, it flows well and doesn't create bridges (unless I use too much).

                                        PXL_20220609_213636256.jpg

                                        NeverDieN L 3 Replies Last reply
                                        2
                                        • A alphaHotel

                                          @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                          @Larson said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                          @NeverDie said in Anyone using/tried the E28-2G4M27S 2.4Ghz LoRa SX1280 27dB module?:

                                          0.4mm diameter Kester Rosin solder.

                                          I'll put it on my list. After the Male/Female antennae discussion above, I'm sure I got my order wrong - so I'll have a new running list shortly when everything arrives. I checked my solder with a caliper since the dimensions are listed in Chinese: it is 0.6 mm so I'm not far away. I do like the feel the smaller diameter has in comparison to my larger solder so I'm sure 0.4 mm will even be better.

                                          Yeah, I was using 0.635mm MG Chemicals solder previously, but I found I had to drown the radio modules in rosin flux afterward to eliminate solder bridges, etc. Perhaps part of the difference may be that Kester uses a different formulation for its in-line flux than MG Chemicals? I suppose that could also have something to do with it. So, maybe it's not entirely diameter, but having now worked with the two different diameters, my gut intuition is that the smaller diameter is helping.

                                          Anyone else reading this having any opinions on the matter that they are willing to share?

                                          I swear by the stuff in the picture below. It melts at a lower temperature(179 C) so, as an amateur, I feel safer keeping my iron at a lower temp and in place a little longer when I am working with IC's. I like that it's thin too as it is easier to control how much you apply. I have no issues with it, it flows well and doesn't create bridges (unless I use too much).

                                          PXL_20220609_213636256.jpg

                                          NeverDieN Offline
                                          NeverDieN Offline
                                          NeverDie
                                          Hero Member
                                          wrote on last edited by
                                          #220

                                          @alphaHotel Thanks for the tip! I added it to my mouser shopping basket.

                                          Like Dave from EEVblog I tend to run my soldering pencil hotter than I should but work quickly to compensate, so maybe with this Chipquik solder I can dial it down. For sure the Chipquik desoldering solder works extremely well.

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