readme.txt

AllSky Dew Heater Module

Status: Stable
Level: Experienced
Runs In: Periodic

This module allows for control of a dew heater via a relay connected to one of the Raspberry Pis GPIO pins.

The module requires an external temperature and humidity sensor. Currently the following sensors are supported

- SHT31
- DHT11
- DHT22
- AHTx0
- BME280
- HTU21
- SOLO-Cloudwatcher


The module contains the following options

Sensor Type: The type of external sensor being used
Input Pin: The GPIO pin used for non i2c sensors such as the DHT11/22
i2c Address: Override the default i2c address for the selected device
Heater Pin: The GPIO pin the heater relay is connected to
Extra Pin: Extra pin that will be triggered with heater pin
Heater Startup State : The state of the heater when starting Allsky
Invert Relay : Normally the GPIO pin will be set High when the heater is required. This option will set the GPIO pin Low when the heater is required
Invert Extra Pin: Normally a GPIO extra pin will go high when enabling the heater. Selecting this option inverts extra pin to go low when enabling heater
Delay: The time in seconds between readings
Limit: If the temperature is this number of degrees above the dew point the heater will be enabled
Forced Temperature: Below this temperature the heater will always be enabled