Boards in 7 GitHub repositories, designed in KiCad, that use the SHT40-AD1F-R2 by Sensirion (-40℃~+125℃ 0%RH~100%RH 1.08V~3.6V 16bit 400nA Factory calibration、Chemical gas resistance、Built-in heater I2C ±0.2℃ ±1.8%RH DFN-4(1.5x1.5) Temperature and Humidity Sensor ROHS). See how each wires it, with its parts, size, README and files; the SHT40-AD1F-R2’s symbol, footprint and pinout are on its own page.
copperheadhq/copperhead-stm32-data-logger
Portable STM32L433 data logger, 50 × 70 mm, four layers, microSD, USB-C LiPo charging. Designed with copperhead. Never built: do not order expecting it to work.
alxgmpr/moisture-sensor
Indoor capacitive soil moisture sensor - nRF54L15 + nPM1300 + FDC1004, BTHome v2 over BLE
owl-and-goat/sensor-board
general-purpose thread-based iot home automation sensor board
ShiegeChan/SensEdu
Ultrasonic Ranging & Detection Development Shield for Arduino GIGA R1
naturalhazardscience/groundlark
Open source hardware for community-powered citizen science
vbartusevicius/weather-station
Open-source rooftop weather and air-quality station with no moving parts (Ø 96 × 235 mm, UV-stabilised ASA): ultrasonic wind, acoustic rain and hail, UV / sunlight / night-sky brightness, temperature, humidity…