Aosong AM2315 temp/rh


#1

Has anyone tried to collect Temp/RH data from a AM2315 sensor?

I've tried the i2C in/out nodes with little success (I get a return from the sensor but it doesn't make sense).

I can get data through python scripts so I know the sensor is wired correctly.


#2

Which hardware? Show us your flow please!


#3
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#4

Please redo pasting the flow between back-ticks or triple back-ticks.

You may need to decode the Python library you are using in order to work out how to read the raw sensor data. Personally, I always put sensors on an Arduino (direct connect) or ESP (output to MQTT) microprocessor so I don't have to think about sensor complexity - there is nearly always a suitable Arduino IDE library available.


#5

Re-pasted a simpler flow inside backticks.....

I am using a Raspberry Pi 3b with a Aosong AM2315.

The sensor needs to be sent a couple of bytes to wake it up then the commands to read (0x03), from register 0 (0x00), and the number of bytes (4). So all together is: [0x03,0x00,0x04]

The I2C input node seems to only allow a single byte in its command.


#6

The backticks should be on separate lines, before and after the code:
```
code
```


#7

sorry - new to this whole forum thing


#8

Still wrong way.
Please read this to get flow sharing done in proper way
https://discourse.nodered.org/t/how-to-share-code-or-flow-json/506


#9

thank you - fixed (really this time)


#10

I am currently working on am2315 temperature sensor on raspberry pi, it will be kind if you can share the flow and how do you connect the sensor, get everything works together, I tried about an hour now but no luck thanks in advance, Elvin.


#11

Elvincth - my flow is pasted further up on the thread - as I stated, I get numbers from the sensor but they don't seem to coincide with my expected HEX Temp/RH.

The sensor needs to be wired to the PI: Red wire to 3.3V, Black wire to Ground, Yellow to SDA, White to SCL. Both Yellow and white wires require a pull-up resistor (I used 10K) from 3.3V.


#12

Thanks mate!


#13

no problem - let me know how it turns out or if you figure out what I've done wrong.


#14

In case anyone is interested I managed to get the AM2315 Temp/RH to work using the NPM i2c-sensor-am2315 driver:

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