Hello, I need help with designing esp based fan controller for FCU.
- Fan
— On / Off
— Speed - Slow, Medium, High
If you are ready to help for a reward, pm me for the details.
If I were doing this, I’d get one of these 4 channel SPDT 30A relay boards and wire it such that L could only be connected to one of the FCU terminals regardless of relay position. Relay3 would be used for ON/OFF. When Relay3 is energized it would power Relay2 common. Relay2 would power either MF or Relay1 common. Relay1 would power either SHF or HF. Relay4 is unused. ESP32 dev board powered from relay board 5V output.
1 Like
@mulcmu Thanks for the board design idea!
How I should configure ESP home to get fan entity?
- Fan entity
– On / Off
– Speed - Slow, Medium, High
Have a look at this post. I think this is what your looking for.
1 Like
I would just use some buttons to control the fan instead of a fan entity, but that’s my preference. Basically you need to setup output pins to control each relay and then configure the relay states to get the right speed energized. The fan implementation @Blacky linked above looks superb if you want a fan entity.
output:
- platform: gpio
pin: 15
id: relay1
- platform: gpio
pin: 16
id: relay2
- platform: gpio
pin: 17
id: relay3
button:
- platform: template
name: "Off"
on_press:
- logger.log: Off Pressed
- output.turn_off: relay1
- output.turn_off: relay2
- output.turn_off: relay3
- platform: template
name: "Low"
on_press:
- logger.log: Low Pressed
- output.turn_on: relay1
- output.turn_off: relay2
- output.turn_off: relay3
- platform: template
name: "Med"
on_press:
- logger.log: Med Pressed
- output.turn_on: relay1
- output.turn_on: relay2
- output.turn_off: relay3
- platform: template
name: "High"
on_press:
- logger.log: High Pressed
- output.turn_on: relay1
- output.turn_on: relay2
- output.turn_on: relay3
You have to make sure you only put power onto 1 speed at a time as per your wiring diagram above. See in the link above and use the “interlock” to ensure this happens or you will let the smoke out.
The fan motors have 4 speeds
@mulcmu, I have merged configs to get fan entity, please have a look.
Will it keep state after ha reboot?
Is it hard to add one more speed?
esphome:
name: games_room_fan
platform: ESP32
board: d1_mini
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: 192.168.0.132
gateway: 192.168.0.1
subnet: 255.255.255.0
api:
logger:
web_server:
# port: 80
ota:
password: !secret ota_password
binary_sensor:
- platform: status
name: "Fan Status"
switch:
- platform: gpio
pin: 15
name: "Games Room Fan Speed 1"
id: speed1
interlock: [speed2, speed3]
- platform: gpio
pin: 16
name: "Games Room Fan Speed 2"
id: speed2
interlock: [speed1, speed3]
- platform: gpio
pin: 17
name: "Games Room Fan Speed 3"
id: speed3
interlock: [speed1, speed2]
output:
- platform: template
id: custom_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- if:
condition:
lambda: return ((state > 0) && (state < 0.33));
then:
# action for speed 1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.33) && (state < 0.66));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_off: speed3
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.66));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_on: speed3
fan:
- platform: speed
id: gamesroomfan
output: custom_fan
name: "FCU Fan"
speed_count: 3
The schematic I posted above had the relays wired differently than the linked post. The linked post is a bit more intuitive as one and only one relay is energized for each fan speed. To wire the 4th relay to LF this would be the arrangement:
HA reboot should not impact the fan state. It would keep running at current speed.
Fan state after ac power loss to fan or esp reboot is controlled by fan: restore_mode
@mulcmu
It will use the same relay right?
How to switch fan off with 4 speeds?
It seems like fan is always on based on design.
Is it going to work?
esphome:
name: games_room_fan
platform: ESP32
board: d1_mini
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: 192.168.0.132
gateway: 192.168.0.1
subnet: 255.255.255.0
api:
logger:
web_server:
# port: 80
ota:
password: !secret ota_password
binary_sensor:
- platform: status
name: "Fan Status"
switch:
- platform: gpio
pin: 15
name: "Fan Speed 1"
id: speed1
interlock: [speed2, speed3, speed4]
- platform: gpio
pin: 16
name: "Fan Speed 2"
id: speed2
interlock: [speed1, speed3, speed4]
- platform: gpio
pin: 17
name: "Fan Speed 3"
id: speed3
interlock: [speed1, speed2, speed4]
- platform: gpio
pin: 18
name: "Fan Speed 4"
id: speed4
interlock: [speed1, speed2, speed3]
output:
- platform: template
id: custom_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- if:
condition:
lambda: return ((state > 0) && (state < 0.25));
then:
# action for speed 1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.25) && (state < 0.50));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.50) && (state < 0.75));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed4
- switch.turn_on: speed3
- if:
condition:
lambda: return ((state > 0.75));
then:
# action for speed 4
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed4
fan:
- platform: speed
id: roomfan
output: custom_fan
name: "FCU Fan"
speed_count: 4
Same relay board should work, was the motor HP and current within the relay rating?
When none of the relays are energized the incoming line power ends up on the 4th relay normally closed contact which isn’t connected to the motor providing the off state.
Nice work on the code changes for 4 speeds, it looks good to me. Is there a d1_mini board with ESP32 processor? Check that configuration. I’d also put the interlock_wait_time of 200ms back in like the go-by code used.
@mulcmu I am planning to use this board as you suggested in the first post.
I have updated the platform and added interlock_wait_time in config.
Everything is correct now?
esphome:
name: some_fan
board: nodemcu-32s
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: 192.168.0.132
gateway: 192.168.0.1
subnet: 255.255.255.0
api:
logger:
web_server:
# port: 80
ota:
password: !secret ota_password
binary_sensor:
- platform: status
name: "Fan Status"
switch:
- platform: gpio
pin: 15
name: "Fan Speed 1"
id: speed1
interlock: [speed2, speed3, speed4]
interlock_wait_time: 200ms
- platform: gpio
pin: 16
name: "Fan Speed 2"
id: speed2
interlock: [speed1, speed3, speed4]
interlock_wait_time: 200ms
- platform: gpio
pin: 17
name: "Fan Speed 3"
id: speed3
interlock: [speed1, speed2, speed4]
interlock_wait_time: 200ms
- platform: gpio
pin: 18
name: "Fan Speed 4"
id: speed4
interlock: [speed1, speed2, speed3]
interlock_wait_time: 200ms
output:
- platform: template
id: custom_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- if:
condition:
lambda: return ((state > 0) && (state < 0.25));
then:
# action for speed 1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.25) && (state < 0.50));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.50) && (state < 0.75));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed4
- switch.turn_on: speed3
- if:
condition:
lambda: return ((state > 0.75));
then:
# action for speed 4
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed4
fan:
- platform: speed
id: roomfan
output: custom_fan
name: "FCU Fan"
speed_count: 4
I loaded your code up on a dev board to test. The custom_fan lambda checks needed <= and the platform: esp32 needed to be added to esphome: Changing the fan speed would control the switches, but changing the switches wouldn’t change the fan speed in HA. I added on_turn_on triggers for the switches to set the right state for the fan. This works for turning any of the switches on but if all switches are off, the fan will still show up as being on in its last state. It might be better just to make the switches internal so they don’t show up in HA and just use the fan component.
Also GPIO15 is a strapping pin so might want to change that to a different pin on your install.
esphome:
name: some_fan
platform: esp32
board: nodemcu-32s
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: 192.168.0.132
gateway: 192.168.0.1
subnet: 255.255.255.0
api:
logger:
web_server:
# port: 80
ota:
password: !secret ota_password
binary_sensor:
- platform: status
name: "Fan Status"
switch:
- platform: gpio
pin: 15
name: "Fan Speed 1"
id: speed1
interlock: [speed2, speed3, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 1
- platform: gpio
pin: 16
name: "Fan Speed 2"
id: speed2
interlock: [speed1, speed3, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 2
- platform: gpio
pin: 17
name: "Fan Speed 3"
id: speed3
interlock: [speed1, speed2, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 3
- platform: gpio
pin: 18
name: "Fan Speed 4"
id: speed4
interlock: [speed1, speed2, speed3]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 4
output:
- platform: template
id: custom_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- if:
condition:
lambda: return ((state > 0) && (state <= 0.25));
then:
# action for speed 1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.25) && (state <= 0.50));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.50) && (state <= 0.75));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed4
- switch.turn_on: speed3
- if:
condition:
lambda: return ((state > 0.75));
then:
# action for speed 4
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed4
fan:
- platform: speed
id: roomfan
output: custom_fan
name: "FCU Fan"
speed_count: 4
restore_mode: RESTORE_DEFAULT_OFF
1 Like
I made switches internal
And replaced 15 pin with 19 pin
Can you reccomend any protective box for the controller?
esphome:
name: some_fan
platform: esp32
board: nodemcu-32s
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
manual_ip:
static_ip: 192.168.0.132
gateway: 192.168.0.1
subnet: 255.255.255.0
api:
logger:
web_server:
# port: 80
ota:
password: !secret ota_password
switch:
- platform: gpio
pin: 16
name: "Fan Speed 1"
id: speed1
internal: true
interlock: [speed2, speed3, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 1
- platform: gpio
pin: 17
name: "Fan Speed 2"
id: speed2
internal: true
interlock: [speed1, speed3, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 2
- platform: gpio
pin: 18
name: "Fan Speed 3"
id: speed3
internal: true
interlock: [speed1, speed2, speed4]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 3
- platform: gpio
pin: 19
name: "Fan Speed 4"
id: speed4
internal: true
interlock: [speed1, speed2, speed3]
interlock_wait_time: 200ms
on_turn_on:
- fan.turn_on:
id: roomfan
speed: 4
output:
- platform: template
id: custom_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- if:
condition:
lambda: return ((state > 0) && (state <= 0.25));
then:
# action for speed 1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.25) && (state <= 0.50));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_off: speed3
- switch.turn_off: speed4
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.50) && (state <= 0.75));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed4
- switch.turn_on: speed3
- if:
condition:
lambda: return ((state > 0.75));
then:
# action for speed 4
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed4
fan:
- platform: speed
id: room_fan
output: custom_fan
name: "FCU Fan"
speed_count: 4
restore_mode: RESTORE_DEFAULT_OFF
I would try to mount the relay board inside the fan junction box to keep all the line voltage contained and protected. Then run a small cable out to the esp in a 3d printed case with just the low voltage signals.
1 Like
@mulcmu Thanks for the help! I have ordered everything.
I will let you know about the assembly results or if I have any additional questions.
@mulcmu
I have connected the board and relay but it doesn’t seem to be working.
When the relay switches, should I be able to hear a clicking sound?
Are there any mistakes that could be causing this issue?
I am using the following config:
esphome:
name: "esphome-3"
esp32:
board: esp32dev
framework:
type: arduino
# Enable logging
logger:
# Enable Home Assistant API
api:
encryption:
key: "BLI5nxOqGwmDh1N5fu1ktPqAxfsdJQ1Su5In/xV0bmM="
ota:
password: "a16521ec9cbe0651981baddc036f1aed"
wifi:
ssid: !secret wifi_ssid
password: !secret wifi_password
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "Esphome-1 Fallback Hotspot"
password: "I19s3bjg4aBR"
captive_portal:
switch:
- platform: gpio
pin: 18
name: "Fan Speed 1"
id: speed1
# internal: true
# interlock: [speed2, speed3, speed4]
# interlock_wait_time: 200ms
- platform: gpio
pin: 19
name: "Fan Speed 2"
id: speed2
# internal: true
# interlock: [speed1, speed3, speed4]
# interlock_wait_time: 200ms
- platform: gpio
pin: 21
name: "Fan Speed 3"
id: speed3
# internal: true
# interlock: [speed1, speed2, speed4]
# interlock_wait_time: 200ms
- platform: gpio
pin: 22
name: "Fan Speed 4"
id: speed4
# internal: true
# interlock: [speed1, speed2, speed3]
# interlock_wait_time: 200ms
output:
- platform: template
id: output_fan
type: float
write_action:
- if:
condition:
lambda: return ((state == 0));
then:
# action for off
- switch.turn_off: speed1
- if:
condition:
lambda: return ((state > 0) && (state <= 0.25));
then:
# action for speed 1
- switch.turn_on: speed1
- if:
condition:
lambda: return ((state > 0.25) && (state <= 0.50));
then:
# action for speed 2
- switch.turn_off: speed1
- switch.turn_on: speed2
- if:
condition:
lambda: return ((state > 0.50) && (state <= 0.75));
then:
# action for speed 3
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_on: speed3
- if:
condition:
lambda: return ((state > 0.75));
then:
# action for speed 4
- switch.turn_off: speed1
- switch.turn_off: speed2
- switch.turn_off: speed3
- switch.turn_on: speed4
fan:
- platform: speed
id: fcu_3
output: output_fan
name: "Fan FCU 3"
speed_count: 100
restore_mode: RESTORE_DEFAULT_OFF
Some (many) of those relay boards require you to pull to ground to activate the relay. Check the specs and then set the GPIO to be inverted …
pin:
number: 18
inverted: true
mode:
output: true
1 Like
@k8n Thanks for the suggestion, but it’s still not working. After some research, I have found a review that stated, “Arduino did not have enough current on an output pin to trigger the board.” Do you have any other ideas on how to make it work?
As I understand it, there are multiple options to make this work:
- Changing the ESP32 board to one with more powerful pins
- Changing the relay to one with lower power requirements
- Adding an external component to increase the power output of the pin
Has anyone else had similar issues where there isn’t enough power output to trigger a relay?