<![CDATA[Readings from TMP36 - Inaccurate]]>Working on the project for the IoT Sensors:

https://onion.io/2bt-python-iot-sensors/

Added the packages and code to run the sensors.

The first time powered up and ran the program, the jumper connectors were heating up. Worked out the pin connections for it and restarted it all, but receiving the following temperature readings:

D2563B62-C09C-4DE5-A74E-F4E5C1FA1E2A.png

What might cause the inaccurate readings?

]]>http://community.onion.io/topic/4191/readings-from-tmp36-inaccurateRSS for NodeMon, 14 Sep 2026 06:24:55 GMTSat, 27 Jun 2020 01:38:10 GMT60<![CDATA[Reply to Readings from TMP36 - Inaccurate on Sat, 27 Jun 2020 01:38:10 GMT]]>Working on the project for the IoT Sensors:

https://onion.io/2bt-python-iot-sensors/

Added the packages and code to run the sensors.

The first time powered up and ran the program, the jumper connectors were heating up. Worked out the pin connections for it and restarted it all, but receiving the following temperature readings:

D2563B62-C09C-4DE5-A74E-F4E5C1FA1E2A.png

What might cause the inaccurate readings?

]]>http://community.onion.io/post/21977http://community.onion.io/post/21977Sat, 27 Jun 2020 01:38:10 GMT<![CDATA[Reply to Readings from TMP36 - Inaccurate on Sat, 27 Jun 2020 09:35:15 GMT]]>@CoffeeCat Check the connections between the ADC Expansion and the TMP36.
(Connect GND to GND, Vout to SIGNAL and +Vs to VCC.)

Analog Devices TMP36 (TO-92)
Analog Devices TMP36 (TO-92).png

]]>http://community.onion.io/post/21978http://community.onion.io/post/21978Sat, 27 Jun 2020 09:35:15 GMT<![CDATA[Reply to Readings from TMP36 - Inaccurate on Sat, 27 Jun 2020 15:54:30 GMT]]>@György-Farkas

Thanks for the information!

Also found these two sites about the TMP36

https://learn.adafruit.com/tmp36-temperature-sensor/overview

http://cdn.sparkfun.com/datasheets/Sensors/Temp/TMP35_36_37.pdf

I’ll check out the jumpers and make sure they are connected to the correct sockets and making contact.

]]>http://community.onion.io/post/21980http://community.onion.io/post/21980Sat, 27 Jun 2020 15:54:30 GMT<![CDATA[Reply to Readings from TMP36 - Inaccurate on Sat, 27 Jun 2020 19:39:27 GMT]]>Switch to a new breadboard to hold the sensors and new wires, also tried two TMP36’s and receive the same reading. Not sure if both are bad from mis-wiring. The other sensors’ readings look normal.

Might order another TMP36 to see if that changes anything.

]]>http://community.onion.io/post/21983http://community.onion.io/post/21983Sat, 27 Jun 2020 19:39:27 GMT<![CDATA[Reply to Readings from TMP36 - Inaccurate on Mon, 29 Jun 2020 01:36:23 GMT]]>Tried a new TMP36 and checked the connections, but no readings yet.

]]>http://community.onion.io/post/21988http://community.onion.io/post/21988Mon, 29 Jun 2020 01:36:23 GMT<![CDATA[Reply to Readings from TMP36 - Inaccurate on Mon, 29 Jun 2020 03:15:27 GMT]]>Figured out the jumpers and addresses in the code for the moisture sensor and temperature sensor were mismatched in the illustration from the tutorial.

947a60c8-a8eb-4f66-80ff-6d8a161d2da2-image.jpeg

Updated the code, temporarily, to verify the connections and components were working:

BC793E01-1474-4ED1-81D1-2841C7C7103A.png

https://onion.io/wp-content/uploads/2018/07/fritzing-model-1024x738.jpg

Sensors are providing readings now in line with other independent sensors.

]]>http://community.onion.io/post/21989http://community.onion.io/post/21989Mon, 29 Jun 2020 03:15:27 GMT