This repo contains components for Microfire sensors that can be used in ESPHome and Home Assistant.
There are several examples:
- example_mod_ec.yaml: Mod-EC used by itself
- example_mod_ec_dallas.yaml: Mod-EC that uses a Dallas DS18B20 as a water temperature source
- example_mod_ph.yaml: Mod-pH used by itself
- example_mod_ph_dallas.yaml: Mod-pH that uses a Dallas DS18B20 as a water temperature source
- example_mod_orp.yaml: Mod-ORP used by itself
- example_ec_ph_dallas.yaml: Mod-EC, Mod-pH and DS18B20 used together
- example_ec_ph_orp_dallas.yaml: Mod-EC, Mod-pH, Mod-ORP and DS18B20 used together
- example_mod_ntc.yaml: Mod-NTC used by itself
- example_mlx90614.yaml: MLX90614 by itself
- example_leaf_vpd.yaml: MLX90614 and SHT3x sensors to calculate leaf VPD
For conductivity and pH measurements, the temperature of the liquid is important. For accurate measurements, a temperature sensor is needed.
The component has several optional configuration variables. See example_mod_ec_dallas.yaml for how it is used.
temperature_sensor- the ID of a temperature sensor, if not provided, 25°C is used.temperature_coefficient- Defaults to 0.019 - The temperature coefficient to use for compensation. This is usually 0.019 for freshwater/hydroponics/pools, and 0.021 for saltwater. Other liquids have different coefficients.temperature_constant- Defaults to 25.0 - The temperature to adjust the measurement to. For example, the default of 25°C will adjust the measured value as if the water was 25°C.
The component has several optional configuration variables. See example_mod_ph_dallas.yamlfor how it is used.
temperature_sensor- the ID of a temperature sensor, if not provided, 25°C is used.
The component has several optional configuration variables. See example_mod_ntc.yamlfor how it is used.
beta- the beta calibration value of the attached NTC temperature sensor.
Each sensor example comes with calibration controls. They are implemented with lamdas within Home Assistant.
An example of the lambda:
- platform: template
id: ec_calibrate_low
name: EC Calibrate Low 0.1
icon: mdi:format-vertical-align-bottom
on_press:
lambda: |-
id(ec).calibrateLow(0.1);To change the particular low-point calibration, edit the 2 0.1 points to match your solution. Do the same thing for mid- and high-points as needed.
The Mod-EC sensor can use up to three calibration points: low, mid, and high. A single point can also be used. Read the datasheet for detailed information.
The Mod-pH sensor can use up to three calibration points: low, mid, and high. A single point can also be used. Read the datasheet for detailed information.
The Mod-ORP sensor uses a single point. Read the datasheet for detailed information.
The Mod-NTC sensor uses a beta value, typically provided by the NTC manufacturer. Read the datasheet for detailed information.
All components can be purchased at microfire.co.
A big thanks to Pascal Vizeli and Jesse Hills for porting our older sensors to ESPHome. They were a great starting point for these components.