@robert-hh Many thanks Robert. I have just done the firmware update for the FiPy and it is working normally now. I was confused in the beginning about the firmware for the Pysense and firmware for the FiPy. Many thanks for the patient explanation.
I found a soultiution which worked for me. I first send data over Lorwan (TTN) and after that I send the data over Sigfox. Then Fipy is deepsleeping and starting again.
When I start with sigfox I was not able to send data to TTN later on.
@steve-williams , I did some power mesurements here on the same setup I mentioned in my previous post to give you a clear picture about the current consumption while the modem is trying to attach so as to help you identifying the problem , in first trial I intentionally powered off the CAT-M1 network in office and run a script on GPY trying to attach
0_1551268954885_Screenshot 2019-02-27 at 12.57.44.png
you can see that the modem current consumption increases after sending attach request and keep trying to attach periodically, you can see that the Avg.current consumption when trying to attach can reach 285mA (150mA more than normal).
The following image is when CAT-M1 network is back online and attaching is successful :
0_1551269393276_Screenshot 2019-02-27 at 13.09.22.png
@edward-dimmack The data sheet tells: -0.3 - 3.6V as maximum ratings. If teh source impedance is high, it should withstand a little bit more than that. Us a shottky diode (e.g. 1N5711, BAT48) for input protection, which has a lower forward voltage.