MorrisJobke / pepper

A DIY La Metric clone

Pepper - A DIY La Metric clone

Requirements

• install following dependencies via the Arduino IDE:
  • PubSubClient (https://github.com/knolleary/pubsubclient)
  • EspMQTTClient (https://github.com/plapointe6/EspMQTTClient)
• copy config.h.dist to config.h and adjust the config options

Known limitations

• MQTT messages have a limit of 128 bytes - https://github.com/knolleary/pubsubclient/#limitations
• The font TomThumb is quite limited in the default setting, thus it needs to be adjusted in the library folder. Open the file Adafruit_GFX_Library/Fonts/TomThumb.h and change TOMTHUMB_USE_EXTENDED to 1 and the 0x7F in the last line of this file to 0xFF or higher. For more details check out the github thread.

Sprites

Sprites are generated via Piskel and then exported as C file.

API

Adjusting the text

Sending a payload to the MQTT_SUBSCRIBE_TOPIC topic will update the text. The payload consists of two parts. The first is the index of the sprite and the second one is the text to display. Both are separated by a space.

The example below will use the logo at index 0 with the text Sunny.

0 Sunny

Adjusting the brightness

Sending a payload with an integer to the MQTT_SUBSCRIBE_TOPIC_BRIGHTNESS topic will update the brightness.

Related projects

• IoT Clock Display
• AWTRIX 2.0
• NRMetric