The problem was with the power supply to envoy.
Thanks everyone for the advice!

четверг, 22 октября 2020 г. в 17:57:34 UTC+3, [email protected]: 

> Things to try:
>
> 1. Are you sure the port is /dev/ttyUSB0 under OpenWrt?
>
> 2. Make sure the baud rate is correct. Perhaps your Envoy expects 
> something other than 19,200?
>
> 3. Make sure nothing else is claiming port /dev/ttyUSB0. If you have the 
> utility 'lsof', you can check this with the command:
>
> *lsof /dev/ttyUSB0*
>
>
> 4. If your version of Openwrt has something like minicom, you can perform 
> a connectivity test. See the section *Establishing connectivity 
> <https://github.com/weewx/weewx/wiki/Troubleshooting-the-Davis-Vantage-station#establishing-connectivity>*
>  in 
> the wiki for how to do this. This also allows you to check the baud rate.
>
> 5. This is not the problem, but your test program needs a small change in 
> order to work. Change this
>
> print "Hardware type is %d" % htype
>
>
> to this
>
> print "Hardware type is %d" % ord(htype)
>
>
> -tk
>
> On Thu, Oct 22, 2020 at 5:58 AM Владислав Торговцев <[email protected]> 
> wrote:
>
>> Hello. I have OpenWrt device with installed Openwrt. It works with 
>> Vantage pro 2 Console and Vantage vue Console, But doesn't work with Davis 
>> Envoy(6316). I get an error: "weewx.WakeupError: Unable to wake up Vantage 
>> console". I have already installed pySerial package, it doesn't help.
>> In other thread(#293 <https://github.com/weewx/weewx/issues/293>, 
>> GitHub) i found this test script:
>> *import serial *
>> *port = serial.Serial("/dev/ttyUSB0", 19200) *
>>
>> *port.write("WRD" + chr(0x12) + chr(0x4d) + "\n")  *
>>
>> *ack = port.read() *
>> *if ack != chr(0x06): *
>> * print "Unable to get ACK. Got %d instead." % ack *
>>
>> *htype = port.read() *
>>
>> *print "Hardware type is %d" % htype *
>> *port.close()*
>>
>> But she stops at the line: "ack = port.read()" , it cannot run line, 
>> however it doesn't show me any errors, it just hangs.
>>
>> Envoy use USB data logger and have this name in system - /dev/ttyUSB0
>> someone faced this problem, or can help with any advice?
>> Thanks in advance to everyone!
>>
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