The M5Stamp C3 module from M5Stack features the Espressif ESP32-C3 Risc-V microcontroller with WiFi and Bluetooth wireless connectivity for IoT devices. The combination of RSA-3072 based secure boot chip and AES-128-XTS based Flash memory encryption, ensures the secure use of Bluetooth communication, thus it is also an optimal device for industrial IoT and data collection applications. The Stamp C3 is based on a 32-bit microcontroller clocked at 160 MHz and has 400 kB of RAM and 4 MB of Flash memory. It supports Bluetooth 5 LE communication and long-range and mesh networking features.