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    Stric

    @Stric

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    Best posts made by Stric

    • Useful comment about DHT22 measurements, and test of various hygrometers..

      At http://www.kandrsmith.org/RJS/Misc/hygrometers.html there is a lot of tests on various hygrometers, like dht22, si7021 etc.

      A useful comment if you are measuring quite seldom can be found at;
      http://www.kandrsmith.org/RJS/Misc/Hygrometers/dht22_other.html
      namely, that upon "measurement" DHT22 actually returns the previous measurement from memory - then actually does a measurement and stores that in memory.
      If you poll once per hour, you get one hour old data every time. Poll twice, or poll "often enough".

      posted in Hardware
      Stric
      Stric
    • Trouble with 115200 baud on 3.3V/8MHz Arduino, like Serial Gateway. Solution: Change baudrate.

      Please read http://forum.arduino.cc/index.php?topic=54623.0 which basically says that the 3.3v arduino can't read stuff at 115200 baud correctly, things get corrupted due to being unable to get the correct timings. In our tests, semicolon (;) gets corrupted quite often. Unfortunately, the semicolon is "quite useful" in the serial protocol of the Gateway.

      Symptoms: Gateway not responding to version checks, gateway not being able to pass on auto-allocated ID's etc.

      Solution: Either change clock to 12MHz (hardware mod + software + blah), or just go slower.. 19200 baud seems to work fine for us. Change baud rate in MySensors.h and recompile your serial gateway. Easy-peasy.

      posted in Troubleshooting
      Stric
      Stric
    • V_DESCRIPTION

      V_DESCRIPTION or somesuch, so the nodes can present what each sensor is.. like "DHT Humidity" "DHT temperature" "DS18x20 temperature" "Distance to garage door" "Garage door locked" ... Right now I'm using VAR5.. but..

      posted in Feature Requests
      Stric
      Stric
    • RE: Which are the *best* NRF24L01+ modules?

      Using a non-scientific method; looking at the angle of battery discharge graphs over a week, I've noticed that the modules I got from ITEAD are draining batteries at about half the rate compared to an unknown (but probably fake) pretty good module.
      ITEAD module; slightly under 1% per day
      "other modules"; about 2% per day
      This is when measuring and transmitting DHT21 data every minute.

      posted in Hardware
      Stric
      Stric
    • RE: Arduino Pro Mini adapter card and nice box from "biltema"

      20150319-211249-01.jpg

      Same card, different box (slightly too small). I cut the LED after taking the picture..

      posted in My Project
      Stric
      Stric
    • RE: Mini Pro with high Baudrate

      What are you using the high baudrate with? Due to clock frequencies etc, the pro mini can't even generate (actually, read) 115200 baud correctly..

      Without further info, it looks like a case of "Doctor, it hurts when I do this" "Well, don't do that then.." 😉

      posted in Troubleshooting
      Stric
      Stric
    • RE: Office plant monitoring

      @Pierre-P
      That i2c thing is painted and works because it's capacitive (it can even sense when your finger is hovering a millimeter or two away from it, like a capacitive touch screen (your phone)). I put one of them into the soil yesterday. If I remember, I will get back regarding results.. I placed it into the same flower as a resistive fork, with the middle chip (so I have some corrosion).

      posted in My Project
      Stric
      Stric

    Latest posts made by Stric

    • RE: Office plant monitoring

      @meanmrgreen See my post a few up, I'm seeing some weird effects when connecting to more than one plant..

      posted in My Project
      Stric
      Stric
    • RE: Office plant monitoring

      @mfalkvidd I'm going to do some tests with changing the sampling time and sleep time, but I'm not so hopeful since the effect is seen hours/days after an "unrelated" change.. I got stuck yesterday playing with ESPEasy, but I'll get back to debugging this..

      posted in My Project
      Stric
      Stric
    • RE: Office plant monitoring

      I have an arduino pro mini, connected to 2-3 flowers using A0+A1, A2+A3, A4+A5.. unfortunately, I'm seeing some weird effects between the plants.. if I water one plant, another can change a bunch at the same time (or not, depending on stuff).. Also if I disconnect one flower, another flower can get way different values too..

      I haven't figured out yet if I'm getting a capacitor effect in the flowers, sending back power through the output signals or what's happening..
      0_1483967302526_flower.png

      Here I added water to the "green" flower, then the values for the gray one dropped. The gray one was physically untouched while watering.

      Code is based on mfalkvidd, with all Ax being set to output=0 and then input+pullup for one while reading..

      posted in My Project
      Stric
      Stric
    • RE: Sensebender Micro as gateway on raspberry pi

      Lower the speed from 115200 to 19200, 9600 or similar. The frequency of the arduino is not able to match 115200 baud exactly, so the arduino and rpi are mis-communicating.

      From another thread; http://wormfood.net/avrbaudcalc.php?postclock=8&hidetables=1

      Solved it for me.

      posted in Development
      Stric
      Stric
    • Useful comment about DHT22 measurements, and test of various hygrometers..

      At http://www.kandrsmith.org/RJS/Misc/hygrometers.html there is a lot of tests on various hygrometers, like dht22, si7021 etc.

      A useful comment if you are measuring quite seldom can be found at;
      http://www.kandrsmith.org/RJS/Misc/Hygrometers/dht22_other.html
      namely, that upon "measurement" DHT22 actually returns the previous measurement from memory - then actually does a measurement and stores that in memory.
      If you poll once per hour, you get one hour old data every time. Poll twice, or poll "often enough".

      posted in Hardware
      Stric
      Stric
    • RE: Office plant monitoring

      @Pierre-P
      That i2c thing is painted and works because it's capacitive (it can even sense when your finger is hovering a millimeter or two away from it, like a capacitive touch screen (your phone)). I put one of them into the soil yesterday. If I remember, I will get back regarding results.. I placed it into the same flower as a resistive fork, with the middle chip (so I have some corrosion).

      posted in My Project
      Stric
      Stric
    • RE: Video How To - Monitor your Refrigerator

      When I arrived at work today and started checking mails, I had received a bunch of them saying that the temperature in the fridge was too high, so I had to drive home and close the door. I would have gotten a notification earlier through jabber if the server software we use for jabber wasn't acting up :(.
      MySensors stuff was not involved in that particular sensor (esic sensor + tellstick + perl + perl), but the need to monitor this stuff was definitely there.

      posted in My Project
      Stric
      Stric
    • RE: Regulations on using home-made electronics?

      .. and you can be prosecuted for putting others in danger etc.

      posted in General Discussion
      Stric
      Stric
    • RE: Temperature / humidity node with OLED display

      @MikeF Maybe an idea about turning on the display.. how about adding a PIR, and turn on the display if movement is detected..? My guess is that it'll lower the power consumption, and still show info when someone is nearby.

      posted in My Project
      Stric
      Stric
    • RE: Mini Pro with high Baudrate

      What are you using the high baudrate with? Due to clock frequencies etc, the pro mini can't even generate (actually, read) 115200 baud correctly..

      Without further info, it looks like a case of "Doctor, it hurts when I do this" "Well, don't do that then.." 😉

      posted in Troubleshooting
      Stric
      Stric