Smart scale with load cells
Print Profile(1)
Bill of Materials
- NodeMCU module x 1: 30pin version without pinheaders
- HX711 module x 1: without pinheaders
- Magnets (optional) x 8: 6mm diameter and 3mm thick
Description
With the help of four weight sensors (load cells), the HX711 module measures the weight of the object placed on the scale (water balloon, gas bottle) and sends it to the smart home system via NodeMCU WIFI.
On the 3D-printed scale, the four load cell sensors snap into place exactly. the HX711 module and NodeMCU need to be glued in place with double-sided adhesive.
Four pairs of 6mm diameter and 3mm thick magnets can be glued to the two halves of the 3D-printed scale, which hold the two halves of the scale together. This is optional.
ESPHome sensor code:
sensor:
- platform: hx711
name: "Balloon"
dout_pin: GPIO1
clk_pin: GPIO14
gain: 128
update_interval: 60s
unit_of_measurement: l
icon: "mdi:water-outline"
device_class: "water"
state_class: "measurement"
accuracy_decimals: 2
filters:
- calibrate_linear:
- 213200 -> 0
- 561100 -> 19
- clamp:
min_value: 0
max_value: 20
ignore_out_of_range: false
- round: 2
License
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.
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