All nRF52840 nRF52832 Thread SensorTag details... Simple Mesh SensorTag details... nRF52840 Dongle board codename : PCA10056 nRF52840 ARM M4 64 MHz 1024 KB ROM - 256 KB RAM Bluetooth 5, Mesh 802.15.4, Thread, Zigbee USB 2 details... nRF52823 UART nRF52832 ARM M4 64 MHz 512 KB ROM - 64 KB RAM Bluetooth Low Energy, mesh Application custom mesh coordinator