Sara-R510aws Evaluation Board to Teensy 4.1 Board

Kits
1

I’m trying to connect the teensy 4.1 board to the Sara r510aws evaluation board so I can send some data from the teensy 4.1 board to the Sara r5 board. What pin out connections would I need to make on the Sara r5 board to the teensy 4.1 board? I think I have to connect the TXD and RXD of the Sara r5 to the teensy board, but those pins are not available on the evaluation board. How would I proceed?

2

You could go about this a few different ways; take a look here https://www.pjrc.com/teensy/pinout.html for the teensy pinout

The easiest way would probably be to just declare DO and DI pins on the R5 in your sketch as being I/O, then wire them to your teensy’s pins…this example https://github.com/sparkfun/MicroMod_As … le6_IOPins might help

You could also use the i2c/qwiic instead…only caveat is that you’d only need to hook up SDA and SCL (not power/GND), so you don’t have the 2 boards’ voltage regulators arguing

You can scroll ~2/3 the way down here https://learn.sparkfun.com/tutorials/mi … e-overview for a chart of the pin #s/functions

3

Ok, thank you for your reply. So just to clarify, I can send the data over via I2C only by connecting the SDA and SCO pins from the R5 to the Teensy right? No other connections?

4

You need ground as well.

/mike

5

Ok thank you. I will try that and see if it works.

6

If I use I2C, wouldn’t i need the address of the sara r510aws board? How would i get that? Let’s say instead of the teensy, i use the arduino uno. pins 0 and 1 are rx and tx on aruino uno. how would i connect those to the pins D0 and D1 on the sara r5 board, and how would i declare them in the sketch so i can send AT commands from the sketch that i upload to the ardunio uno?

7

What are the UART pins on the SARA R510AWS Eval Board? I am not sure what the TX and the RX pins are on the SARA R510AWS board, please advise as soon as you can! thanks!

8

Looking at the schematic (https://cdn.sparkfun.com/assets/4/0/d/5 … ematic.pdf), it looks like the UART goes from the module, through IC1 and IC2 to convert them to 3.3v levels, and show up on the micromod connector on pins 13,15,17,19, 20, 22

9

Yeah I took a look at that. I figured it out now, and gotten it to interface with the teensy board. Thanks again for your help!