Wi-Fi + Bluetooth LE module, dual-core, 8 MB flash, 8 MB PSRAM
| Supply | 3.0–3.6 V |
| Radio | Wi-Fi 2.4 GHz, BLE 5 |
| Flash | 8 MB + 8 MB PSRAM |
| Interface | UART, SPI, I²C, USB |
Wi-Fi + Bluetooth module, dual-core, 4 MB flash
| Supply | 3.0–3.6 V |
| Radio | Wi-Fi 2.4 GHz, BT 4.2 |
| Flash | 4 MB |
GSM/GPRS module, quad-band, SMS and data
| Supply | 3.4–4.4 V |
| Bands | 850/900/1800/1900 |
| Interface | UART |
Wi-Fi + Bluetooth LE module, RISC-V, 4 MB flash
| Supply | 3.0–3.6 V |
| Radio | Wi-Fi 2.4 GHz, BLE 5 |
| Flash | 4 MB |
GSM/GPRS module, quad-band, SMS and data
| Supply | 3.4–4.4 V |
| Bands | 850/900/1800/1900 |
| Interface | UART |
STM32F411 board, Cortex-M4F, 100 MHz, USB-C
| Flash | 512 KB |
| MCU | STM32F411CEU6, Cortex-M4F, 100 MHz |
STM32F103C8T6 board, Cortex-M3, 72 MHz
| Flash | 64 KB |
| MCU | STM32F103C8T6, Cortex-M3, 72 MHz |
STM32 Nucleo-64 board, STM32F401RE, on-board ST-LINK
| Flash | 512 KB |
| MCU | STM32F401RE, Cortex-M4F, 84 MHz |
Incremental rotary encoder, 1000 P/R, NPN open collector
| Supply | 5–24 V DC |
| Resolution | 1000 P/R |
| Shaft | 6 mm |
Power relay, SPDT, 10 A, 24 V DC coil
| Contacts | SPDT, 10 A |
| Coil | 24 V DC |
| Mount | Socket |
