Can't put my SEN0466 sensor into the passive mode vie UART
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Hi,
I am trying to get my sensor (SEN0466) into the passive mode by sending 0xff 0x01 0x78 0x04 0x00 0x00 0x00 0x00 0x83 via UART (9600 baud 8N1). Unfortuately I get no response from the sensor and the default active mode goes on.
Can someone help me?
I use an ATtiny441 (see my attached code snipped)
I tried the mode change with the terminal software HTerm. It worked well. But I don't understand why I can not change the mode by using my Attiny. The modify code 0xff 0x01 0x04… is sending to the sensor by the Attiny correctly but without success.
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Could you please try connecting the Gravity: Factory Calibrated Electrochemical CO Sensor to your PC via TTL to USB converter?
![](https://dfimg.dfrobot.com/nobody/makelog/d5a9251d84b1dd7350b112465d04ecfa.png)
You can try setting the software to send commands as shown above and see if you can enter passive mode.
If it doesn't work, that could be an hardware issue.
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