MicroMod Data Logging carrier board + ESP32 - Serial to LTE GNSS Breakout

[willemBCN]

I can for the live of me not get serial communication established between the MicroMod carrier board and the LTE GNSS Breakout board.

I would assume that following should work:

#define saraSerial Serial

SARA_R5 mySARA;

mySARA.enableDebugging();

// Initialize the SARA

if (mySARA.begin(saraSerial, 9600) )

{

Serial.println(F(“SARA-R5 connected!”));

}

else

{

Serial.println(F(“Unable to communicate with the SARA.”));

Serial.println(F(“Manually power-on (hold the SARA On button for 3 seconds) on and try again.”));

while (1) ; // Loop forever on fail

}

Serial.println();

However no matter what I will get:

SARA-R5 Example

init: Begin module init.

sendCommandWithResponse: Command: E0

init: Module failed echo test.

init: Begin module init.

init: Attempting autobaud connection to module.

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

sendCommandWithResponse: Command: +IPR=9600

sendCommandWithResponse: Command:

init: Begin module init.

init: Power cycling module.

I’m starting to wonder if the RX1/TX1 on the the MicroMod Data Logging Carrier Board are not connected?

[TS-Russell]

I’d sooner suspect the chosen UART pins are doing something else/mucking up the works; do you happen to have a different MicroMod processor to test with?

Here are some notes regarding use of specific pin functions https://learn.sparkfun.com/tutorials/mi … e-overview - I’d just make sure your code is using either the primary or secondary and that the pin #s in code match up

[kennyA_JP]

Hi

I’ m facing on the same situation (error) with “SparkFun MicroMod - Single Board” + “SparkFun MicroMod ESP32 Processor” + “SparkFun LTE GNSS Function Board - SARA-R5”.

I tried to run some sample codes from “SparkFun_u-blox_SARA-R5_Arduino_Library”, which are the official one.

Even if the serial interface is defined correctly like “#define saraSerial Serial1”, unfortunately the serial connection between ESP32 processor and the Function board can not be established well.

I’d like to know how to fix it.