Smart Chassis 4WD

thingiverse

Bought a Smart Auto Chassis 4WD on AliExpress and as always: the acryl chassis was cracked on delivery. So I decided to draw my own chassis. I have designed it 1cm wider so a L298n motordriver could fit between the tt motors. I have a small 3D printer so I split the chassis is printable on a 140x170mm print bed. I used the following materials. - 4x tt motor - 4x speed code disk - 4x optical endstop limit switch - 4x wheels - 2x L298n motor drivers - 1x Wemos D1 R32 ESP32 - 3x 18650 25A cells - 1x BMS print (25A) - WII remote and nunchuk - Switch for turning off and switch to charging mode - Charching input I try to use only m3: - ?x ring m3 - ?x lockring m3 - ?x m3x16mm - ?x m3x12mm - ?x m3 bolt - 8x m3x30mm (lowhead) Update 21-12-2020: Added a firmware.bin file and a zip with the arduino platformIO project. This is a firmware for the wemos board connected at the L298n motor driver boards: // right back define RB_FW 27 define RB_BW 16 define RB_SPEED 33 // leftback define LB_FW 25 define LB_BW 17 define LB_SPEED 04 // right front define RF_FW 19 define RF_BW 18 define RF_SPEED 32 // right front define LF_FW 13 define LF_BW 12 define LF_SPEED 26