SCD40

This module should work with Sensirons SDC40, SCD41 and SCD43 sensors, although it has only been tested on the SDC40. Use the SCD40 (About Modules) module for it.

You can wire this up as follows:

How to use my module:

To Set up the module

  I2C2.setup({scl:B10,sda:B3});
  var scd = require("SCD40").connectI2C(I2C2);

To make a single measurement

  scd.measure_single_shot();
  scd.get_data_ready_status();
  readings = scd.read_measurement();
  console.log({readings});

To make a continous measurements

  scd.start_periodic_measurement();
  readings = scd.read_measurement();
  console.log({readings});

  scd.stop_periodic_measurement();

The other calls as defined in the datasheet have all been set up in the module.

The module also contains a commented out version of the C code to calculate the crc-8 checksum used for these chips. It runs in around 1.2 ms on the pico, where as the Javascript version takes around 4.5 ms. If performance is an issue this can be used instead.

Reference

• APPEND_JSDOC: MOD123.js

  Using

(No tutorials are available yet)