ScreenServer

The goal of this project is to develop a remotely controlled OLED screen.

Technology Stack

• Raspberry Pi 3 Model B (to be potentially replaced with a cheaper alternative)
• SH1106-driven 128x64 OLED screen
• Golang

To Build

1. Get the source code

go get github.com/samarkin/screen-server/cmd/oledd
go get github.com/samarkin/screen-server/cmd/create-user

2. Disable go modules

go env -w GO111MODULE=auto

3. Create user

cd $GOPATH/src/github.com/samarkin/screen-server/cmd/oledd
go run github.com/samarkin/screen-server/cmd/create-user

4. Build and run

go run github.com/samarkin/screen-server/cmd/oledd

Sample Usage

1. Find out IP of your Raspberry Pi. For example, 192.168.1.5.

2. From any computer connected to the same network make an HTTP request to port 6533 (OLED spelled on phone keypad)

   1. Obtain the auth token first (using login in password that you provided previously):

      tokenHeader=`curl -v --silent --data '{"login":"admin", "password":"admin"}' http://192.168.1.5:6533/api/login 2>&1 | grep X-Session-Token | cut -c 3- | tr -d '\r\n'`
      

   2. Display a message

      curl -v -H $tokenHeader --data '{"text": "Hello, world!"}' http://192.168.1.5:6533/api/messages
      

Full API Description