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ESPHome sample configuration for an HX711 powered Smart Scale including Auto-Tare functionality.
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| Moved to https://github.com/markusressel/ESPHome-Smart-Scale |
Hi,
I am trying to build a scale for an aquarium (I want to find out how much water evaporates) using 4 x load cells and a HX711 ADC converter.
I followed this example here for the wiring (I have the same load cells)
Now I have followed the example code in the esphome docs and I already get values back.
At least a success :slight_smile:
Here is my code:
sensor:
- platform: dallas
address: 0xee00000006ffb128
name: "Aquarium Temperature"
- platform: hx711
name: "Aquarium Gewicht"
id: smart_scale_hx711_value_raw
dout_pin: GPIO16
clk_pin: GPIO17
gain: 128
unit_of_measurement: kg
accuracy_decimals: 3
update_interval: 1s`
Next I wanted to calibrate the whole thing as indicated in the esphome docs.
But I can’t get any further here.
I have connected the 4 x load cells as described in the link and there is no weight at all, but I still get different raw values all the time.
Here is what the log says:
`[23:13:27][D][hx711:031]: 'Aquarium Gewicht': Got value 142727
[23:13:27][D][sensor:127]: 'Aquarium Gewicht': Sending state 142727.00000 kg with 3 decimals of accuracy
[23:13:28][D][hx711:031]: 'Aquarium Gewicht': Got value 142691
[23:13:28][D][sensor:127]: 'Aquarium Gewicht': Sending state 142691.00000 kg with 3 decimals of accuracy
[23:13:29][D][hx711:031]: 'Aquarium Gewicht': Got value 142741
[23:13:29][D][sensor:127]: 'Aquarium Gewicht': Sending state 142741.00000 kg with 3 decimals of accuracy
[23:13:29][D][api:102]: Accepted ::FFFF:C0A8:7FFE
[23:13:30][D][api.connection:861]: Home Assistant 2022.8.7 (::FFFF:C0A8:7FFE): Connected successfully
[23:13:30][D][hx711:031]: 'Aquarium Gewicht': Got value 142719
[23:13:30][D][sensor:127]: 'Aquarium Gewicht': Sending state 142719.00000 kg with 3 decimals of accuracy
[23:13:31][D][hx711:031]: 'Aquarium Gewicht': Got value 142671
[23:13:31][D][sensor:127]: 'Aquarium Gewicht': Sending state 142671.00000 kg with 3 decimals of accuracy
[23:13:32][D][hx711:031]: 'Aquarium Gewicht': Got value 142706
[23:13:32][D][sensor:127]: 'Aquarium Gewicht': Sending state 142706.00000 kg with 3 decimals of accuracy
[23:13:33][D][hx711:031]: 'Aquarium Gewicht': Got value 142632
[23:13:33][D][sensor:127]: 'Aquarium Gewicht': Sending state 142632.00000 kg with 3 decimals of accuracy
[23:13:34][D][hx711:031]: 'Aquarium Gewicht': Got value 142580
[23:13:34][D][sensor:127]: 'Aquarium Gewicht': Sending state 142580.00000 kg with 3 decimals of accuracy
[23:13:35][D][hx711:031]: 'Aquarium Gewicht': Got value 142630
[23:13:35][D][sensor:127]: 'Aquarium Gewicht': Sending state 142630.00000 kg with 3 decimals of accuracy
[23:13:36][D][hx711:031]: 'Aquarium Gewicht': Got value 142619
[23:13:36][D][sensor:127]: 'Aquarium Gewicht': Sending state 142619.00000 kg with 3 decimals of accuracy
[23:13:37][D][hx711:031]: 'Aquarium Gewicht': Got value 142586
[23:13:37][D][sensor:127]: 'Aquarium Gewicht': Sending state 142586.00000 kg with 3 decimals of accuracy
[23:13:38][D][hx711:031]: 'Aquarium Gewicht': Got value 142667
[23:13:38][D][sensor:127]: 'Aquarium Gewicht': Sending state 142667.00000 kg with 3 decimals of accuracy
[23:13:39][D][hx711:031]: 'Aquarium Gewicht': Got value 142539
[23:13:39][D][sensor:127]: 'Aquarium Gewicht': Sending state 142539.00000 kg with 3 decimals of accuracy
[23:13:40][D][hx711:031]: 'Aquarium Gewicht': Got value 142599
[23:13:40][D][sensor:127]: 'Aquarium Gewicht': Sending state 142599.00000 kg with 3 decimals of accuracy
[23:13:41][D][hx711:031]: 'Aquarium Gewicht': Got value 142565
[23:13:41][D][sensor:127]: 'Aquarium Gewicht': Sending state 142565.00000 kg with 3 decimals of accuracy
[23:13:42][D][hx711:031]: 'Aquarium Gewicht': Got value 142529
[23:13:42][D][sensor:127]: 'Aquarium Gewicht': Sending state 142529.00000 kg with 3 decimals of accuracy
[23:13:43][D][hx711:031]: 'Aquarium Gewicht': Got value 142524
[23:13:43][D][sensor:127]: 'Aquarium Gewicht': Sending state 142524.00000 kg with 3 decimals of accuracy
[23:13:44][D][hx711:031]: 'Aquarium Gewicht': Got value 142535
[23:13:44][D][sensor:127]: 'Aquarium Gewicht': Sending state 142535.00000 kg with 3 decimals of accuracy
[23:13:45][D][hx711:031]: 'Aquarium Gewicht': Got value 142517
[23:13:45][D][sensor:127]: 'Aquarium Gewicht': Sending state 142517.00000 kg with 3 decimals of accuracy
[23:13:46][D][hx711:031]: 'Aquarium Gewicht': Got value 142574
[23:13:46][D][sensor:127]: 'Aquarium Gewicht': Sending state 142574.00000 kg with 3 decimals of accuracy
[23:13:47][D][hx711:031]: 'Aquarium Gewicht': Got value 142515
[23:13:47][D][sensor:127]: 'Aquarium Gewicht': Sending state 142515.00000 kg with 3 decimals of accuracy
[23:13:48][D][hx711:031]: 'Aquarium Gewicht': Got value 142527
[23:13:48][D][sensor:127]: 'Aquarium Gewicht': Sending state 142527.00000 kg with 3 decimals of accuracy
[23:13:49][D][hx711:031]: 'Aquarium Gewicht': Got value 142562
[23:13:49][D][sensor:127]: 'Aquarium Gewicht': Sending state 142562.00000 kg with 3 decimals of accuracy
[23:13:50][D][hx711:031]: 'Aquarium Gewicht': Got value 142508
[23:13:50][D][sensor:127]: 'Aquarium Gewicht': Sending state 142508.00000 kg with 3 decimals of accuracy
[23:13:51][D][hx711:031]: 'Aquarium Gewicht': Got value 142530
[23:13:51][D][sensor:127]: 'Aquarium Gewicht': Sending state 142530.00000 kg with 3 decimals of accuracy
[23:13:52][D][hx711:031]: 'Aquarium Gewicht': Got value 142508
[23:13:52][D][sensor:127]: 'Aquarium Gewicht': Sending state 142508.00000 kg with 3 decimals of accuracy
[23:13:53][D][hx711:031]: 'Aquarium Gewicht': Got value 142544
[23:13:53][D][sensor:127]: 'Aquarium Gewicht': Sending state 142544.00000 kg with 3 decimals of accuracy
[23:13:54][D][hx711:031]: 'Aquarium Gewicht': Got value 142518
[23:13:54][D][sensor:127]: 'Aquarium Gewicht': Sending state 142518.00000 kg with 3 decimals of accuracy
[23:13:55][D][hx711:031]: 'Aquarium Gewicht': Got value 142501
[23:13:55][D][sensor:127]: 'Aquarium Gewicht': Sending state 142501.00000 kg with 3 decimals of accuracy
[23:13:56][D][hx711:031]: 'Aquarium Gewicht': Got value 142525
[23:13:56][D][sensor:127]: 'Aquarium Gewicht': Sending state 142525.00000 kg with 3 decimals of accuracy
[23:13:57][D][hx711:031]: 'Aquarium Gewicht': Got value 142504
[23:13:57][D][sensor:127]: 'Aquarium Gewicht': Sending state 142504.00000 kg with 3 decimals of accuracy
[23:13:58][D][hx711:031]: 'Aquarium Gewicht': Got value 142535
[23:13:58][D][sensor:127]: 'Aquarium Gewicht': Sending state 142535.00000 kg with 3 decimals of accuracy
[23:13:59][D][hx711:031]: 'Aquarium Gewicht': Got value 142555
[23:13:59][D][sensor:127]: 'Aquarium Gewicht': Sending state 142555.00000 kg with 3 decimals of accuracy
[23:14:00][D][hx711:031]: 'Aquarium Gewicht': Got value 142575
[23:14:00][D][sensor:127]: 'Aquarium Gewicht': Sending state 142575.00000 kg with 3 decimals of accuracy
[23:14:01][D][hx711:031]: 'Aquarium Gewicht': Got value 142577
[23:14:01][D][sensor:127]: 'Aquarium Gewicht': Sending state 142577.00000 kg with 3 decimals of accuracy
[23:14:02][D][hx711:031]: 'Aquarium Gewicht': Got value 142608
[23:14:02][D][sensor:127]: 'Aquarium Gewicht': Sending state 142608.00000 kg with 3 decimals of accuracy
[23:14:03][D][hx711:031]: 'Aquarium Gewicht': Got value 142667
[23:14:03][D][sensor:127]: 'Aquarium Gewicht': Sending state 142667.00000 kg with 3 decimals of accuracy
[23:14:04][D][hx711:031]: 'Aquarium Gewicht': Got value 142674
[23:14:04][D][sensor:127]: 'Aquarium Gewicht': Sending state 142674.00000 kg with 3 decimals of accuracy
[23:14:05][D][hx711:031]: 'Aquarium Gewicht': Got value 142793
[23:14:05][D][sensor:127]: 'Aquarium Gewicht': Sending state 142793.00000 kg with 3 decimals of accuracy
[23:14:06][D][hx711:031]: 'Aquarium Gewicht': Got value 142834
[23:14:06][D][sensor:127]: 'Aquarium Gewicht': Sending state 142834.00000 kg with 3 decimals of accuracy
[23:14:07][D][hx711:031]: 'Aquarium Gewicht': Got value 142847
[23:14:07][D][sensor:127]: 'Aquarium Gewicht': Sending state 142847.00000 kg with 3 decimals of accuracy
[23:14:08][D][hx711:031]: 'Aquarium Gewicht': Got value 142891
[23:14:08][D][sensor:127]: 'Aquarium Gewicht': Sending state 142891.00000 kg with 3 decimals of accuracy
[23:14:09][D][hx711:031]: 'Aquarium Gewicht': Got value 142935
[23:14:09][D][sensor:127]: 'Aquarium Gewicht': Sending state 142935.00000 kg with 3 decimals of accuracy
All these different values within 1 minute and there is no weight at all.
Why is this?
If the values are so extremely different, how can I calibrate the whole thing reasonably?
Above all, which of the many raw values do I use for 0 kg?
Please use the repository for questions and issues.
https://github.com/markusressel/ESPHome-Smart-Scale
I'm wondering if anyone can help.
I have used this with an ESP8266 board in an outside hedgehog box. It weighs the hogs as they are feeding. Everything works, however the zero reading drifts massively being outside. I have tried a previous auto tare which keeps the reading at 0g throughout the day, but the weight is quite a distance out once the temperatures drop on the night.
Can anyone include some code so that I can use a spare GPIO pin on the board so as the hog enters the box, the scales zero themselves before it reaches the main compartment ?
Current code is:
globals:
- id: constant_weight
type: float
`captive_portal:
sensor:
-
platform: hx711
id: weight
name: "HX711 Value2"
dout_pin: GPIO14
clk_pin: GPIO12
gain: 128
update_interval: 5s
unit_of_measurement: g
filters:
calibrate_linear:
- 68604 -> 0
- 626959 -> 2030
on_value:
- if:
condition:
- lambda: |-
static float last = 0.0;
float diff = x - last;
last = x;
return x < 50.0 && diff < 1.0 && diff > - 1.0;
then:
- lambda: 'id(constant_weight) = x;' -
platform: template
name: Hog Weight2
icon: mdi:scalee
unit_of_measurement: g
accuracy_decimals: 0
lambda: 'return id(weight).state;'
filters:
- lambda: 'return x - id(constant_weight);'
- lambda: 'return x >= 10.0 ? x : 0;'
- delta: 0.5`
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This is really cool, thanks for setting it up! Did you wire the HX711 to the VIN/5v on your ESP device? I keep getting "HX711 is not ready to read values" in the ESPHome Logs and googling that error doesn't produce many results. Not many people have used this board with the ESPHome platform, so thanks for your experimentation!