Autonomous LoRaWAN node easily connectible via TTN/Helium networks, supporting downlinks. LaRaWAN node based on Seeed Studio' Wia-E5 module (based STM32WLE), so no additional transceiver needed - the main MCU and LoRa PHY already inside - suitable air quality monitoring, garden, intelligent home, automatization... You may connect load remotely by downlinks - via AO3400A transistor (on board). Optimized for Sensirion SEN54 sensor. MPPT and Li-Ion battery charger for power from 5V++ cheap solar panels. 10+ years of autonomic work with cheap 2W solar panel and standard 1850 Li-Ion battery expected. Sleeping current below 1 mA.