Hardware Description
STICKER is a compact IoT device built on the STM32WL System-on-Chip with an integrated LoRa radio and ARM Cortex-M4F core.
It is powered by two AA batteries, with battery voltage monitoring and efficient power management (boost converter and LDO).
The device includes NFC memory and antenna for simple configuration, even without power (energy harvesting).
It features a rich set of built-in sensors:
- Temperature and humidity (SHT43)
- Light intensity (OPT3001)
- Atmospheric pressure (MPL3115A2)
- PIR motion (PYD1698)
- 3-axis accelerometer (LIS2DH12)
- Dual Hall-effect door opening detector (A1266)
For flexibility, there is also:
- 1-Wire bus master for external sensors
- Terminal block for external inputs
Device status is indicated by a multi-color LED (R/G/Y) and communication is handled via an internal 868/915 MHz antenna.
Block Diagram
NFC Configuration Architecture
Overview
Sticker Clime - Enclosure, Mainboard, and Battery Holder
Sticker Input - Enclosure, Mainboard, and Battery Holder
Sticker Motion - Enclosure, Mainboard, and Battery Holder
Hardware Schematics
Power
Download Power Schematic (PDF)
Antenna
Download Antenna Schematic (PDF)
MCU
Sensors
Download Sensors Schematic (PDF)
NFC
Technical Specification
| Category | Parameter | Value |
|---|---|---|
| Structure | Enclosure material | ABS |
| Dimension | 91 × 36.5 × 33.3 mm | |
| Power | Nominal cell voltage | 1.5 V |
| Nominal battery capacity | 3000 mAh | |
| Operating voltage range | 1.8 V to 3.6 V | |
| Idle power consumption | < 80 µA | |
| Peak power consumption | < 100 mA | |
| Environment | Operating temperature | -30 °C to +70 °C |
| Storage temperature | -30 °C to +70 °C | |
| Enclosure protection | IP40 | |
| Sensors | Integrated thermometer – Measurement range | -20 °C to +60 °C |
| Integrated thermometer – Measurement accuracy | ±0.2 °C (0 °C to 65 °C) | |
| Integrated hygrometer – Measurement range | 0 % to 100 % | |
| Integrated hygrometer – Measurement accuracy | ±2 % (from 10 % to 90 %) | |
| PIR – Detection range | 5 m | |
| PIR – Viewing angle | ≥ 50° |
