RT-RTClock - A FreeRTOS based NTP-Clock

This Project explores FreeRTOS on the RaspberryPi Pico W by developing a C++ abstraction layer in the context of a simple desk clock.

Building

See pico-sdk readme for a list of pre-requisites.

Use the cmake or environment variables PICO_SDK_PATH to use a local pico-sdk, and PICO_BOARD to select another target board. By default the pico-sdk will be fetched from Github and the target board will be "pico_w".

git submodule update --init
cmake -B build -DCONFIG_WIFI_SSID="your_wifi_ssid" -DCONFIG_WIFI_PASSWORD="your_wifi_password"
cmake --build build

The image will end up in build/app/RTRTClock.uf2.

Add -DCONFIG_DEBUG_PRINT_RUNTIME_STATS=ON to enable extended heap and task run-time statistics on serial console.

Hardware

A RaspberryPi Pico W and a SSD1306 128x64 I²C display connected to GPIO2(SDA) and GPIO3(SCL).

Configuration

In RTRTClockConfig.h.in you can change:

• Wifi authentication method (default: WPA2_AES_PSK)
• NTP server (default: pool.ntp.org)
• NTP update interval (default: 1 hour)
• Timezone (default: CET/CEST)
• Temperature update interval (default: 20 seconds)
• Temperature offset (default: -4.0°C)
• Temperature unit (default: Celsius)
• Display clock mode (default: 24h)
• Display hardware config (default: I²C block 1, Address 0x3C, 1MHz, Pin 2+3)