The two versions of the board look very similar
Nano SIM card slot: Compatible with NB-IoT SIM cards for seamless connectivity
EEPROM for data storage: 1024 bytes
ideal for reliable level and distance measurements outdoors
Pololu High-Power Stepper Motor Driver 36v8 bio-sensor The two versions of theThe Pololu High Power Stepper Motor Driver 36v8, equipped with the DRV8711 IC, enables control of large bipolar stepper motors with operating voltages from 8V to 50V and continuous currents of up to 8A per phase (11A with sufficient cooling). It offers SPI configurable settings, nine microstep resolutions (full step, 1 2 step, 1 4 step, 1 8 step, 1 16 step, 1 32 step, 1 64 step, 1 128 step, 1 256 step), adaptive current control, and optional STEP DIR