(1) HX711 Forum Discussion Notes 1/4
https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=227137&hilit=hx711+tlfong01#p1393160

(2) HX711 Forum Discussion Notes 1/4
https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=227137&hilit=hx711+tlfong01#p1395349

(3) HX711 Forum Discussion Notes 1/4
https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=227137&hilit=hx711+tlfong01&start=25#p1395658
1kg = 3.2mV

(4) HX711 Forum Discussion Notes 1/4 (calibration Notes)
https://www.raspberrypi.org/forums/viewtopic.php?f=37&t=227137&hilit=hx711+tlfong01&start=25#p1395939