MakeCode Package for the ADS1115

This library provides a Microsoft Makecode package for the ADS1115. See https://joy-it.net/products/COM-KY053ADC for more details.

Behaviour considered to be a pass

As long as the raw value and voltages still change depending on what is/will be connected. This is considered a pass, even the small jitter of up to +/- 10 in the raw value is an indicator of a pass.

Behaviour considered to be a fail

As soon as the output values no longer change. This is considered a failure, since the functionality is basically no longer given and no "real" value can be read.

I2C Address

You can use the Initialize ADS1115 with Address (...) block to change the I2C address used for communication with the ADS.

// Change the I2C address depending on how the ADS1115 is connected
// ADDR to GND -> 0x48 (default)
// ADDR to VCC -> 0x49
// ADDR to SDA -> 0x4A
// ADDR to SCL -> 0x4B
// Standard initialization with ADDR at GND, resulting in I2C address 0x48
ADS1115.initADS1115(userInI2C.Gnd)

Mode

The Set the Mode to (...) block allows you to change the mode used to perform the measurements.

// Change the mode depending on the type of measurement you want to perform
// Several measurements in succession (default)
ADS1115.setMode(mode.Multi)
// A single measurement
ADS1115.setMode(mode.Single)

Gain

The Set the Gain to (...) block allows you to change the gain used in measurements and calculations.

// Change the gain based on the voltages you want to use or work with
// + /-6.144V range  =  Gain 2/3
// + /-4.096V range  =  Gain 1
// + /-2.048V range  =  Gain 2 (default)
// + /-1.024V range  =  Gain 4
// + /-0.512V range  =  Gain 8
// + /-0.256V range  =  Gain 16
ADS1115.setGain(gain.Two)

Sample Rate

With the block Set the samplerate to (...) you can change the number of measurements that the ADS1115 should perform in one second.

// Change the samplerate to better fit your needs
// Values ADS1115
// Rate1 -> 8 samples per second
// Rate2 -> 16 samples per second
// Rate3 -> 32 samples per second
// Rate4 -> 64 samples per second
// Rate5 -> 128 samples per second (default)
// Rate6 -> 250 samples per second
// Rate7 -> 475 samples per second
// Rate8 -> 860 samples per Second
ADS1115.setRate(rate.Rate5)

Reading Raw Values on Channels

To read the raw values from each channel, you can use the Read on Channel (...) block, which returns the raw value as a variable 'res'. To fully use the block, it must write to the serial monitor.

// Choosing the Channel which is to be read
// Channel 0 -> Single - ended AIN0 (default)
// Channel 1 -> Single - ended AIN1
// Channel 2 -> Single - ended AIN2
// Channel 3 -> Single - ended AIN3
// Channel 4 -> Differential P = AIN0, N = AIN1
// Channel 5 -> Differential P = AIN0, N = AIN3
// Channel 6 -> Differential P = AIN1, N = AIN3
// Channel 7 -> Differential P = AIN2, N = AIN3
serial.writeLine("" + (ADS1115.read(0)))

Converting Raw Values to Voltages

To calculate the voltages of the individual channels, you can use the Raw Value to Voltage block, which returns the voltages based on the entered 'raw' variables. To fully use the block, it must write to the serial monitor.

// Reads any raw value (raw) either from the previously specified channel or from any other variable and converts it to voltages
serial.writeString("" + (ADS1115.raw_to_v(ADS1115.read(0))))
serial.writeLine(" V")

Read raw values from multiple channels

To read the raw values from each channel, you can use the Read from channel (...) to (...) block, which returns the raw values of the specified channels.

// Choosing which channels should be read
// start min = 0 | start max = 4
// end min = 0 | end max = 4
// Reads the specified channels (start, end) based on the specified parameters (0 to 4)
    readMulti = ADS1115.readMulti(0, 4)
    serial.writeLine("" + (readMulti[0]))
    serial.writeLine("" + (readMulti[1]))
    serial.writeLine("" + (readMulti[2]))
    serial.writeLine("" + (readMulti[3]))
    serial.writeLine("---------")

Supported targets

• for PXT/microbit

License

MIT