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💬 Central MA-02

openhardware.io 1 Feb 2017, 12:47 last edited by openhardware.io 8 Mar 2017, 02:34

https://www.openhardware.io/view/330/Central-MA-02
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OpenHardware.io • relay switch hlk-pm01 acdc wemos usau • 9 Jul 2017, 16:12 • openhardware.io 20 Jul 2017, 03:48

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@Jonathan-Roberts said in Simple AC/DC Switch WeMos: @nca78 bummer. So I think 2 options... What if the Wemos is raised off the PCB. That would be almost 5/8". In your experience would that help? And maybe the best option, slide the antenna module straight down,. move the relay up and spin it around so the connections are on the outside edge. I'm trying to make this multi-purpose and allowing both headers to be fully functional to other projects. thx for the advise. 1 would help but not that much. It's already not a good thing to have the transformer just next to it on the side, so you should avoid blocking one more direction with tracks. I don't understand your necessity to have connectors available for something else on the relay that is too high to put anything on top ? 2 sounds like a much better option, make sure you have nothing right and left of the antenna when you move things around. The problem you will have with this layout is the USB in that situation... It doesn't sound like a great idea to me to use Wemos on this board especially for the relay part, it's just a cheap chinese relay with 3/4 components so why not just put them directly on you board to make the layout so much easier ? I have the feeling that you're trying to make things "easier" by using Wemos and its shields, but in the end you seem to lose more than you gain. And neither does it seem "safer" to use their relay shield as it forces you to have extra wires between main of the HLK and relay shield connector.
esp8266 gateway keeps resetting on keepalive
Troubleshooting • esp8266 reset • 14 Nov 2015, 02:02 • vlad 27 Feb 2016, 04:30

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27 Feb 2016, 04:30

@vlad I am having the same issue. Where did you change keepalive timeout to a long time? Essentially, what file did you edit, what parameter and to how long?
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Troubleshooting • esp8266 arduino uno fail fpar • 3 Oct 2020, 09:16 • Tomáš Mengler 13 Oct 2020, 08:03

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13 Oct 2020, 08:03

Ok, no help here.
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ESP8266MQTTClientGateway
Bug Reports • gateway mqtt esp8266 • 30 Jan 2016, 10:26 • mbj 30 Jan 2016, 14:16

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@hek That was very visible, please excuse my ignorance. Even though I have looked at this page I managed to leave the change unnoticed.
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@gohan Indeed... See e.g. my experience here: https://forum.mysensors.org/topic/2890/chinese-rubbish-or-is-it
ESP8266 WiFi settings in EEPROM
Development • esp8266 wifi eeprom • 11 Feb 2016, 13:42 • Alexander Voronin 12 Feb 2016, 11:06

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12 Feb 2016, 11:06

@Yveaux I have 34 of 80k RAM used for this sketch, so 128 bytes looks like "a bit more". You can not use progmem with ESP and mysensors now because PSTR redefined as PSTR(x) (x) so all strings are really in RAM
💬 vESPrino - The IOT Dongle
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The final version of the boards contains few notable improvements Removed the PCB under the ESP8266 antenna. The previous design had PCB + Ground Plane, which resulted in VERY low reception. It worked just few meters away from the router. Removed the Temperature Probe - On the one hand - it does not really measure real temperature, on the other hand it populates the Single Analog port, and makes it unavailable for other usages Added place for an optional LDR (in case the Analog port is not used - one could add an LDR for added value) The connection between GPIO 16 and RST (Deep Sleep) is not bridged via a 0603 0ohm resistor (jumper). Depending on application it may be enabled or not Added a Power 5V line. That is - controlled via a SOT232 mosfet and one GPIO. This way you can connect power hungry modules and then turn them on or off. There are small mosfets rated ~ 2-3 amps for couple of cents. The big 12mhz crystal for the CH340G was replaced by a small patch ceramic oscillator to save space Added an additional mounting hole Added additional test pads for the unused GPIOs Added one Diode in series with the power to the WS2812B LED. It turned out, when powered directly via a USB Battery bank, the voltage can be 5.30-5.40v. And apparently WS2812B, does not light if VIN is > 5.15V. So putting a generic small Diode would drop 0.3-0.4V Here is how the latest design looks like

💬 Central MA-02

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