Hi I just got my board and it looks good but none of the documents available have provided any information about how to connect the cellular chips UART (Rx and Tx). For my application, I can’t just use a USB connection. That makes no sense. And honestly would rather not have all the bells and whistl…

You can connect to UART1 through the expansion cable, we are doing that. You can also configure this port for AT commands with the AT!MAPUART command as described on page 80 of the AT command reference. However you are still going through the Linux processor. You cannot connect to the cell modem dir…

I believe there is a USB to UART connector to connect to the UART console. You can type “microcom /dev/ttyAT” there to enter AT command in the application. To quit the application, you can type ctrl+x.

Hi there thanks for responding. What i mean is, are there pins to connect to the uart? Normally on cellular modules there are Rx and Tx pins you can wire up to a microcontroller. For my application i can’t use a USB cable since i need my microcontroller to send the commands. As for the interface i w…

This is helpful, thank you. I was wondering, is expansion cable the same thing as the expansion port? I noticed the mango yellow has a port with a bunch of pins on it where it looks like you could connect something. The schematic called it the expansion port.

I think you mean the expansion connector as described on page 32 of the M-Y Hardware Architecture Guide. The expansion cable is the cable that plugs into the expansion connector. :wink:

Oh goody! Thanks for pointing me there. I saw on page 28 of the architecture guide that they have a table saying what each pin on the expansion cable does! This is exactly what I was looking for. Thanks to everyone who kindly responded!

How to send AT commands on MangOH yellow board?

mangOH Yellow

jyijyi July 21, 2020, 3:17am 4

suggest you taking a look on this schematic and see if there is testing point for you to use:

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How to send AT commands on MangOH yellow board?

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