SODAQ SARA-N211 no contact to modem

NB-IoT
1

Hi
I have received 6 of the new SODAQ SARA-N211 with Arduino on board and can’t get the nbIOT_serial_passthrough to work. How should I set the serial bus to communicate to the modem?
I have also tried to upgrade the FW on the modem, but does not work. (Works on the NB-IoT sheild).

2

Hi,

You need to change the Serial Passthrough sketch.

#include “Arduino.h”

#define USB SerialUSB
#define UBLOX Serial1
#define powerPin UBLOX_EN

unsigned long baud = 9600; //start at 9600 allow the USB port to change the Baudrate

void setup()
{
pinMode(TX_PWR_GATE, OUTPUT);
pinMode(TX_18_33, OUTPUT);

digitalWrite(TX_PWR_GATE, HIGH); // U8 level translator powered on
digitalWrite(TX_18_33, LOW); // select the I/O voltage

pinMode(powerPin, OUTPUT); // Turn the nb-iot module on
digitalWrite(powerPin, HIGH);

delay(1000);

// Start communication
USB.begin(baud);

USB.println(“Serial Port Active”);

UBLOX.begin(baud);
}

// Forward every message to the other serial
void loop()
{
while (USB.available())
{
uint8_t c = USB.read();
UBLOX.write©;
}

while (UBLOX.available())
{
USB.write(UBLOX.read());
}

// check if the USB virtual serial wants a new baud rate
if (USB.baud() != baud) {
baud = USB.baud();
UBLOX.begin(baud);
}
}

3

Hi,

If the latest nbiot library is installed you can load the example

Sketch -> examples -> sodaq_nbiot -> serial_passthrough

Kind regards,
Jan

4

Hi

Still having problems with the board. serial_passthrough do not work. No response in the terminal.
I see ChrisK is writing…

pinMode(TX_PWR_GATE, OUTPUT);
pinMode(TX_18_33, OUTPUT);

digitalWrite(TX_PWR_GATE, HIGH); // U8 level translator powered on
digitalWrite(TX_18_33, LOW); // select the I/O voltage

Do I really need this?
What are the TX_PWR_GATE and TX_18_33?
Where can I find a shematic for the board?

Kind regards
Henrik

5

@Henrik_Sihm

These are the old pinnames.
You need to use the sketch on this page with the latest boardfiles:
http://support.sodaq.com/sodaq-one/sara/

Kind regards,
Jan

7

Problem solved!

Used the wrong board all the time.
Used Arduino Genuino Zero instead of SODAQ SARA.