After restoring my main unit with a full reflash via usb I have lost communication with the 7600. The 7600 itself seems to be fine as I can connect via usb and send/receive AT commands. Before I look at the hardware rx/tx lines to see if there is anything being transmitted between the two boards I thought it might be sensible to reset the 7600 with AT+CRESET. I take it there are no custom settings and a reset will be fine? Any other suggestions on diagnosing the problem? I also noticed the PoweringOn and PoweringOff pulses do not match the specification sheet in the current code base, with a typical pulse of 500ms to turn "on" and min pulse of 2500ms to turn "off". Once I get my unit working again I will test and submit a PR. Many thanks