I have one of these and am trying to get it in AT Command Mode. I have it connected to a USB to Serial TTL cable with the TX and RX pins crossed. I have tried every combination of communication settings and several terminal programs to be able to enter this mode. I’ve been unsuccessful. If while connected, I factory reset the module, I will see text on in the terminal program saying that it is being reset. However when I try to enter AT Mode with $$$, nada. Almost like the transmit pin is not working. For reference, my cable is an FT232 5V cable.
Anyone got ideas?
Thanks.