So, having put the old Envoy back on the Rpi (having shown it worked on the 
PC) this is what I get....looks like some kind of continuous Loop situation.

pi@WeatherPi:~ $ sudo /etc/init.d/weewx stop
[ ok ] Stopping weewx (via systemctl): weewx.service.
pi@WeatherPi:~ $ sudo minicom -b 19200 -D /dev/ttyUSB0



Welcome to minicom 2.7

OPTIONS: I18n 
Compiled on Apr 22 2017, 09:14:19.
Port /dev/ttyUSB0, 12:42:51

Press CTRL-A Z for help on special keys

LOO1 =vˆ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿÂ         b 2
v)LOO1 =vˆ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿÂ       b 2
ULOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½        b 2
/‚LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
/‚LOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
 ¾LOO1 =vŠ 4H   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
 ±LOO1 =vŠ 4H   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
 «LOO1 =vŠ 4H   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
 «LOO1 =vŠ 4H   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
¾—LOO1 =vŠ 4H   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
¾—LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
/‚LOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
³˜LOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
³˜LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2
/‚LOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
]eLOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
Á LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
Á LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
Á LOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
³˜LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
/‚LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
/‚LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     
/‚LOO1 =vŠ 4I   ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½       b 2        
     

¤LOO1 =vŠ 4I  ÀÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5‘? ÿÿÿÿÿÿÿ½         b 2
âYLOO1 =vŠ 4I   ÁÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPÿÿÿÿÿÿÿÿÿ   5⊑? ÿÿÿÿÿÿÿ½       b 2
 ¾LOO1 =vŠ 4I   Áÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ

On Friday, 12 March 2021 at 12:40:56 UTC+13 monmul wrote:

> But from the tests on my PC, it seems the old Envoy is working....does it 
> not.(so we do not have to worry about the new Envoy for now!)...so it would 
> appear as if the RPi is the culpit....have I deducted correctly?
>
> On Friday, 12 March 2021 at 02:29:03 UTC+13 [email protected] wrote:
>
>> They did, but it was about 7 or 8 years ago. 
>>
>> You really need to call Davis. 
>>
>> On Wed, Mar 10, 2021 at 7:22 PM Graham Eddy <[email protected]> wrote:
>>
>>> i do recall that davis introduced an incompatability between old 
>>> firmware and new datalogger but i don’t recall the details. i’m sure a 
>>> search of the forum archive would see if that was relevant
>>>
>>> On 11 Mar 2021, at 2:17 pm, monmul <[email protected]> wrote:
>>>
>>> Yes I am using the original data logger and cable that came with the old 
>>> Envoy....I take out the data logger from he old one and put it in the new 
>>> one...I suspect that the data logger may not be compatible with the new 
>>> Envoy
>>>
>>>
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>>> .
>>>
>>

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