I have a MicroMod Machine Learning Carrier Board with an RP2040 Processor Board. I have attempted to replicate the [getting started example for the accelerometer example https://learn.sparkfun.com/tutorials/mi … elerometer but I am stuck. The LIS2DH12 accelerometer is not detected.
My code is shown below, using the Arduino IDE:
#include <Wire.h>
#include "SparkFun_LIS2DH12.h" //Click here to get the library: http://librarymanager/All#SparkFun_LIS2DH12
SPARKFUN_LIS2DH12 accel; //Create instance
int n = 0;
void setup() {
// initialize digital pin LED_BUILTIN as an output.
pinMode(LED_BUILTIN, OUTPUT);
Serial.begin(115200);
delay(1000);
Serial.println("Ready ...");
Wire.begin();
if (accel.begin() == false)
{
delay(1000);
Serial.println("Accelerometer not detected. Check address jumper and wiring. Freezing...");
while (1)
;
}
}
// the loop function runs over and over again forever
void loop() {
digitalWrite(LED_BUILTIN, HIGH); // turn the LED on (HIGH is the voltage level)
delay(1000); // wait for a second
digitalWrite(LED_BUILTIN, LOW); // turn the LED off by making the voltage LOW
delay(1000); // wait for a second
n++;
String o = String("Loop " + String(n) + " complete");
Serial.println(o);
}
I have checked the LIS2DH12 for the I2C address and I even tried passing the address as a parameter to accel.begin() but that didn’t work. I also tried scanning I2C using an example code from Arduino but nothing was detected. I used the code below for that:
// ---------------------------------------------------------------- /
// Arduino I2C Scanner
// Re-writed by Arbi Abdul Jabbaar
// Using Arduino IDE 1.8.7
// Using GY-87 module for the target
// Tested on 10 September 2019
// This sketch tests the standard 7-bit addresses
// Devices with higher bit address might not be seen properly.
// ---------------------------------------------------------------- /
#include <Wire.h> //include Wire.h library
void setup()
{
Wire.begin(); // Wire communication begin
Serial.begin(115200); // The baudrate of Serial monitor is set in 9600
while (!Serial); // Waiting for Serial Monitor
Serial.println("\nI2C Scanner");
}
void loop()
{
byte error, address; //variable for error and I2C address
int nDevices;
Serial.println("Scanning...");
nDevices = 0;
for (address = 1; address < 127; address++ )
{
// The i2c_scanner uses the return value of
// the Write.endTransmisstion to see if
// a device did acknowledge to the address.
Wire.beginTransmission(address);
error = Wire.endTransmission();
if (error == 0)
{
Serial.print("I2C device found at address 0x");
if (address < 16)
Serial.print("0");
Serial.print(address, HEX);
Serial.println(" !");
nDevices++;
}
else if (error == 4)
{
Serial.print("Unknown error at address 0x");
if (address < 16)
Serial.print("0");
Serial.println(address, HEX);
}
}
if (nDevices == 0)
Serial.println("No I2C devices found\n");
else
Serial.println("done\n");
delay(5000); // wait 5 seconds for the next I2C scan
}
The code didn’t detect any devices. I, unfortunately, do not have other processor boards, such as the Artemis, to try. I will willing to order those just so I can see whether the issue is with the RP2040 or the carrier board.
I do not know if I am doing anything wrong, or whether the RP2040 doesn’t support the LIS2DH12 accelerometer.
