Tiny Pager

This is a trivially simple chat app running on the LilyGO T LoRa Pager DevKit.

This is an extremely early version, so manage your expectations.

It uses a Scala/Akka bridge to interface with OpenAI, with WhatsApp integration in progress and potential for other services in the future.

Currently, it communicates with the server via Wi-Fi and websockets, using a trivially simple protocol with partial updates but no retries or read indicators yet.

Main reason why I made this was to experiment with the excellent clay layout library. The whole embedded side is written in pure C. A bunch of stuff is still kinda iffy (especially regarding the memory and WiFi of the ESP32S3).

TODO

Prio

• There is no way to create a conversation
• Code cleanup
• Setup documentation
• Input issues (random short/long press) - maybe related to debounce logic
• Queue messages
• Wifi reliability & speed (though maybe my wifi is ass)
• WhatsApp business logic

Future plans

• Partial display update
  • do this SIMD
  • might also free up a bunch of on-chip RAM since tiles will have to be accessed in a non-DMA scheme anyways
• Scroll/edit in compose view
• Animate compose view
• Simulator
• BMS advanced & gauge
• Lower power usage (idk how much is possible)
• Brightness
• Dark mode
• Signal business logic
• LoRa
• GSM extension board

Useful Stuff

to complie protoc-c (or protoc-gen-c) inside esp-idf:

CPPFLAGS="-I/opt/homebrew/opt/protobuf@21/include" \
CFLAGS="-I/opt/homebrew/opt/protobuf@21/include" \
LDFLAGS="-L/opt/homebrew/opt/protobuf@21/lib" \
LIBS="-lprotobuf" \
PROTOC="/opt/homebrew/opt/protobuf@21/bin/protoc" \
./configure