UART3
2 devices
Heltec LoRa Kit 151

Ultra-low-power LoRaWAN development kit based on STM32L151CBU6 ARM Cortex-M3 MCU and Semtech SX1278 LoRa transceiver, with 6uA deep sleep current, integrated battery management, and CE certification.
ARM Cortex-M3 single-core @ 32MHz, ultra-low-power16KB SRAM128KB
~$14View

Pine64 Ox64
sbc
Pico-sized RISC-V SBC powered by the Bouffalo Lab BL808 triple-core SoC with WiFi, BLE 5.0, and Zigbee. Features 64MB PSRAM, up to 16MB flash, microSD slot, USB-C with MIPI-CSI camera support, and 26
Bouffalo Lab BL80864 MB PSRAM16 MB128 MB26 GPIOWiFi 802.11 b/g/nBLE BLE 5.0Zigbee IEEE 802.15.4
~$6View
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