Smoke and flammable gas sensor (LPG, methane, hydrogen)
| Supply | 5 V |
| Interface | Analog + digital |
| Range | 300–10000 ppm |
Digital temperature sensor, 1-Wire, ±0.5 °C
| Supply | 3.0–5.5 V |
| Interface | 1-Wire |
| Range | −55…+125 °C |
Ultrasonic distance sensor, 2–400 cm
| Supply | 5 V |
| Interface | Trigger / echo |
| Range | 2–400 cm |
Digital temperature and humidity sensor, ±0.5 °C, ±2 % RH
| Supply | 3.3–6 V |
| Interface | Single-wire |
| Range | −40…+80 °C, 0–100 % RH |
Digital temperature and humidity sensor, ±2 °C, ±5 % RH
| Supply | 3.3–5.5 V |
| Interface | Single-wire |
| Range | 0…+50 °C, 20–90 % RH |
ESP32 development board, Wi-Fi + Bluetooth, 4 MB flash
| Radio | Wi-Fi 2.4 GHz, BT 4.2 |
| Flash | 4 MB |
| MCU | ESP32-WROOM-32E, dual-core, 240 MHz |
Digital temperature sensor, 1-Wire, ±0.5 °C
| Supply | 3.0–5.5 V |
| Interface | 1-Wire |
| Range | −55…+125 °C |
Bluetooth Low Energy module (CC2541), UART
| Supply | 3.3–6 V |
| Radio | BLE 4.0 |
| Interface | UART |
ESP8266 Wi-Fi module, 1 MB flash, AT commands
| Supply | 3.0–3.6 V |
| Radio | Wi-Fi 2.4 GHz |
| Flash | 1 MB |
Thermocouple module with K-type probe, up to 1024 °C
| Supply | 3.0–5.5 V |
| Interface | SPI |
| Range | 0…+1024 °C |
