ina219 v0.1.0 INA219
INA219 Driver for Elixir using ElixirALE.
Usage
In your config.exs
add the following:
config :ina219,
devices: [
%{
bus: "i2c-1",
address: 0x41,
commands: [:calibrate_32V_2A!],
current_divisor: 10,
power_divisor: 2
}
]
You must set the bus
and address
values according to your system.
Calibration
Calibrating these wee chips is a bit of a pain in the donkey, but is easily
achieved by following the equation in the data sheet. Once you have the
calibration and divisor values you wish to use you can configure the device
manually (see the hexdocs for INA219.Commands
for more information). For
example:
%{
bus: "i2c-1",
address: 0x41,
commands: [
calibrate: 8192,
bus_voltage_range: 32,
shunt_voltage_pga: 8,
bus_adc_resolution_and_averaging: {1, 12},
shunt_adc_resolution_and_averaging: {1, 12},
mode: :shunt_and_bus_voltage_continuous
],
current_divisor: 10,
power_divisor: 2
}
Link to this section Summary
Link to this section Functions
Link to this function
connect(config)
Connect to an INA219 device.
Link to this function
disconnect(device_name)
Disconnect an INA219 device.