Hi. I have a couple of MangOH Red boards, each with HL7692 Cellular modem IC fitted. Is it possible to talk AT commands to the HL7692, rather than go via the % prompt interface ? Does that interface have a ‘direct mode’, that would let me talk AT commands direct with the HL7692 ? I couldn’t spot how to from the various MangOH docs, or in this forum. But quite possibly I’m not searching for the right terms. In the first instance, I’m interested just in issuing an ATI3 command, to find the HL7692 firmware version. Perhaps the interface issues an ATI3 command itself, and has the HL7692 firmware version to hand. If only I knew what to do, to ask the interface for it. Help ! Best regards, David
So mangOH red is not really designed to work with the HL units, it can but its not optimal. To get to the UART on the unit you need to go through either the Pi connector (standard pin out) or the IoT connect (with an appropriate card).
Hi. I didn’t appreciate before that mlw was yourself Matthew, thanks for the reply. OK, using the Raspberry Pi connector UART pins, I can now successfully communicate direct with the HL7692, sending AT commands, and receiving responses, at standard Pi comspec 115200N81. I’m using a standard FTDI USB-UART 3V3 adaptor cable, per pics. Is talking AT commands direct with the HL7692 not a common use case of a MangOH, hence not described how to in the MangOH Red docs? Interesting to hear that the MangOH Red is not really designed to work with the HL. I’d not heard so. Are there other MangOH models that are better suited? Best regards, David
Talking to the HL series through UART/AT commands is obviously the only way to work with the unit as this is the primary interface. As I say the HL works with the mangOH boards because of the CF3 (common flexible form factor) strategy but is not optimised for it hence no connector on the board leads to this interface.
MangOH was always designed as a tool for developers to tinker with the WP and is embedded processing capabilities and produce PoC’s quickly, not as an entry level dev kit although several people can use it like this, as you are, but there are limitations.
I think mangOH yellow is better than red in this respect but I have not explictly looked/got one myself yet.
You can use the mangoh red hl78 version as it comes with a rs232 iot card.
Thanks for your heads-up there, interesting.
Ah, we presently have 2x MangOH Red (one deep fried), each fitted with HL7692. No RS232 IoT card present.
The ‘in’ via the Raspberry Pi connector UART Tx/Rx pins looks to be a solution for our modest present needs.