On 2019-11-24 19:26, Craig Leres wrote:
I think ultimately would be interesting is a trace of the PWKEY pin on the simcom. I might try taking a wire to the board.
So. I tacked a wire onto the collector of Q2 on a v3.1 modem board (which is connected to the PWKEY pin of the simcom). While running it's 1.8V, it goes to 0V for one second when you do either of: power simcom off power simcom on See attached. The SIM5360 hardware design guide says, "PWRKEY should be pulled low at least 180ms to power on or 500ms to power off the module." So not likely a surprise to whoever wrote our code. So far I haven't figured out how to wedge the simcom on purpose. But my v3.2 module simcom wedged when I was driving on Wednesday. While on the road I checked the iphone ovms app and it showed my location as being a couple of miles from my house even though I was more like 60 miles away. Craig
