ATTiny IR transmitter

10 button remote control with each button supporting macro commands sending a sequence of codes to different devices

An improved version can be found at https://github.com/roberttidey/ATTinyTx This is more memory efficient and supports driving 433MHz Transmitters like Lightwave Codes will need to be redefined due to change in EEPROM layout

Features

Based on ATTiny85 (DigiStamp)
Battery operated with low quiescent current for extended battery life
Supports 10 macro commands each containing a sequence of up to 20 device codes
variable delay between each code in a sequence
Supports up to 32 different device codes
Supports NEC, rc5, 5c6 type encoding
Macros and device codes stored in EEPROM
uart port (2400 baud) for programming device codes and macros and for testing
timing can be tweaked to give close to 38.4KHz modulation and best baud rate

Build and install

Add TinyIrUart.h library for IR and Uart support
Build under Arduino with Digistump support
Upload over USB
Quiescent current can be optimised
- fuse start time to minimum
- fuse clock select to internal 8MHz

Operation

Normally in sleep
A normal button press wakes up, executes macro and immediately returns to sleep
A long button press (> 5 seconds) leaves controller temporarily awake for about 90 seconds
Serial port can be attached to achieve configuration while awake
If powered on with button pressed then OSCVAl and Ticks are reset to defaults

Serial Commands

{'c','m','o','r','s','t','x','z'}

Save a code cCode,Type,Addr, Val1,Val2,Val3
- Code=code number (0-31)
- Type = 0(NEC),1(rc5),2(rc6),3(rc6Extended)
- Addr = IR Address
- Val = 1,2 or 3 data values
Save a macro sequence mMacro,Sequence...
- Macro = macro number (0-9)
- Sequence is code(0-31)+32*delay(0-7) (0,100,200,400,800,1600,3200,6400mS)
Adjust Timing oCmd,Val
- Cmd 0 is read OSCVAL (Basic 8MHz clock), Ticks (to divide to 38.4KHz)
- Cmd 1 is adjust OSCVAL (Val=0 decrement, Val=1 increment)
- Cmd 2 is adjust Ticks (Val=0 decrement, Val=1 increment)
Read Macros and code r
- Dumps all codes and Macros to serial port
Set sleep Mode sMode
- Mode 0(start sleeping), 1(temporary awake), 2(permanent awake)
- use this again to set back to sleeping after configuration finished
Test transmit a code tType,Address,Val1,Val2,Val3
- same parameter definitions as c Command
Execute Macro xMacro
- Send macro sequence as previously defined
Send Code zCode
- Send Code as previously defined

Capture IR codes

Often the codes for a remote can be found on the web
A utility rxirEx.py is also provided in the docs folder which can get codes for nec and rc6 based remotes
This can be run on a Raspberry Pi with an IR receiver connected to a GPIO pin (24 default)
IR polarity is defined near top of rxirEx.py (default is high is IR active, using an inverting buffer to amplify output of receiver)
Prepare a text file like the example (philipstv-top) which contains a list of the buttons to capture
Run the program, enter device name (e.g. philipstv, subset of buttons (e.g. top), protocol (e.g. rc6) and retry (e.g. n)
It will prompt for each button to be pressed in turn
Results are placed in device.ircodes (e.g. philipstv.ircodes)
Each button has the hex and binary data received and the address and command values are at the end of the line
These last two values are what is needed to program the ATTinyIR device

roberttidey / ATTinyIR