jasonacox
commented
3 years ago I don't have a Tuya sensor to help you troubleshoot. What device did you get?
The tinytuya or tuyapower scan functions should decrypt the UDP payload:
python -m tinytuyaDo you see the sensor in that list? If so, grab the Device ID and IP address. You can get the LOCAL KEY via the method described here: https://github.com/jasonacox/tinytuya#get-the-tuya-device-local-key
In case it helps, the data points (DPS) mapping for the sensor should be here: https://github.com/jasonacox/tinytuya#version-33---sensor-type
I suspect sensors may not respond to polling, but if it does, you could try something like:
import tinytuya
deviceID = "xxxxxxxx"
ipAddress = "xxxxxxxx"
localKey = "xxxxxxxx"
d = tinytuya.OutletDevice(deviceID, ipAddress, local_key)
d.set_version(3.3)
data = d.status()
print('Response from Sensor: %r' % data)If that doesn't work, we would need to decrypt the UDP payload. It would be something similar to how we decode the response payload (see https://github.com/jasonacox/tinytuya/blob/master/tinytuya/__init__.py)
log.debug('status received data=%r', data)
result = data[20:-8] # hard coded offsets
if self.dev_type != 'default':
result = result[15:]
log.debug('result=%r', result)
if result.startswith(b'{'):
# this is the regular expected code path
if not isinstance(result, str):
result = result.decode()
result = json.loads(result)
elif result.startswith(PROTOCOL_VERSION_BYTES_31):
# got an encrypted payload
# expect resulting json to look similar to:: {"devId":"ID","dps":{"1":true,"2":0},"t":EPOCH_SECS,"s":3_DIGIT_NUM}
result = result[len(PROTOCOL_VERSION_BYTES_31):] # remove version header
result = result[16:] # Remove 16-bytes appears to be MD5 hexdigest of payload
cipher = AESCipher(self.local_key)
result = cipher.decrypt(result)
log.debug('decrypted result=%r', result)
if not isinstance(result, str):
result = result.decode()
result = json.loads(result)
elif self.version == 3.3:
cipher = AESCipher(self.local_key)
result = cipher.decrypt(result, False)
log.debug('decrypted result=%r', result)
if not isinstance(result, str):
result = result.decode()
result = json.loads(result)
else:
log.error('Unexpected status() payload=%r', result)
return result
grigvlad
I have the CO2 PM2.5 temp humidity sensor. Despite developing in Labview and not in Python, I hope you could help. My device works well with app, and also I have managed to communicate with it using my code in Labview using Tuya APIs. I get its device id and category, but it says the reading of measurements is not supported. In wireshark, I got its UDP payload, 172 bytes length. How can I decode it? what is the structure of the payload ? 1.txt hope for your help