I would like to contribute for those who cares in 4 steps.
T Sensor
For an experimental purpose, a used a DHT22 than switched for a 18ds20. Kept in code for the better comprehension.
T Regulator
I have used the same pid component for the regulation, but as output used the ac_dimmer component. To set up the PID values Kp, Kd, Ki please see below.
Dimmable Output
I used the ac_dimmer component because of the triac hardware. The main advantages are:
- Price 2.5 € vs 10 € for an SSR
- The on state voltage is about 0.85V versus 1.6V of an SSR. And the power dissipation is than twice lower, as well as the dissipator for it
- You manage the max voltage on it. So you can reduce the wear of the oven (see max_power parameter)
- You manage the min voltage on it. So you can avoid the high frequency oscillations due to approaching the set point
Set up PID
I referred to the file [Russian] .
- Set Kp = 100, Kd = Ki = 0 and let the system heat
- You will see a Temperature curve of your sensor like this
- After 4-5 oscillations, calculate the values as follows and report them to the code:
- Kp = 1.2 * DeltaT
- Ki = 1.5 * Tau
- Kd = 0.2 * Tau
Here is my code
sensor:
- platform: dht
pin: GPIO14
temperature:
id: sauna_temperature_sensor
name: "Sauna temperature"
humidity:
name: "Sauna humidity"
update_interval: 1s
model: DHT22
output:
- platform: ac_dimmer
id: dimmer1
max_power: 0.8
min_power: 0.2
gate_pin: GPIO32
zero_cross_pin:
number: GPIO33
mode:
input: true
inverted: yes
climate:
- platform: pid
id: pid_climate
name: "PID Sauna Controller"
visual:
min_temperature: 40 °C
max_temperature: 90 °C
temperature_step: 1 °C
sensor: sauna_temperature_sensor
default_target_temperature: 70°C
heat_output: dimmer1
control_parameters:
kp: 1.44
ki: 13.5
kd: 1.8
I would like to contribute for those who cares in 4 steps.
T Sensor
For an experimental purpose, a used a DHT22 than switched for a 18ds20. Kept in code for the better comprehension.
T Regulator
I have used the same pid component for the regulation, but as output used the ac_dimmer component. To set up the PID values Kp, Kd, Ki please see below.
Dimmable Output
I used the ac_dimmer component because of the triac hardware. The main advantages are:
Set up PID
I referred to the file [Russian] .
Here is my code
sensor:
pin: GPIO14
temperature:
id: sauna_temperature_sensor
name: "Sauna temperature"
humidity:
name: "Sauna humidity"
update_interval: 1s
model: DHT22
output:
id: dimmer1
max_power: 0.8
min_power: 0.2
gate_pin: GPIO32
zero_cross_pin:
number: GPIO33
mode:
input: true
inverted: yes
climate:
id: pid_climate
name: "PID Sauna Controller"
visual:
min_temperature: 40 °C
max_temperature: 90 °C
temperature_step: 1 °C
sensor: sauna_temperature_sensor
default_target_temperature: 70°C
heat_output: dimmer1
control_parameters:
kp: 1.44
ki: 13.5
kd: 1.8