Discord on a calculator

The idea Discord on a calculator.

An ESP8266 goes online and talks to the TI-Nspire over USB serial. The calculator shows a friends list and the chat, and sends messages back.

My first project with serial, an ESP, C and Lua all at once. The code is rough on both sides, and the README says so.

Connecting

• Update the friends list in discord.tns and the token in the ESP project
• Start the program on the calculator
• Plug in the ESP and wait for Wi-Fi (the light stops blinking)
• Press Enter to start listening to serial data

Friends list One channel per friend.

friends = {
    "FriendName1:channelId_1",
    "FriendName2:channelId_2",
    "FriendName3:channelId_3",
}

Serial protocol

Chat message

<m:CHANNEL_ID>MSG1||MSG2||MSG3</m>

Internet update

//UPDATE//ssid||password

Channel update

//CHANNEL//channel_id

The dock connector Built, never used.

Besides the USB-B cable I made a custom dock connector adapter from a lab cradle’s connector and a 3D-printed case. It needs system version 3.1 or older, or Ndless, and my calculator is on v6.