ESL Blaster
USB IR transmitter firmware and hardware design files.
Available for purchase on furrtek.org.
Installation
For Linux and Windows 7 you might have to download the STM32 VCP driver. Windows 8 and up should install the correct driver automatically.
The device will simply appear as a Virtual COM Port. As there's no real COM Port interface, speed and data format doesn't matter.
Firmware update
Short the two solder pads on the back:
Plug the device in and use dfu-util-0.9-win64 with FWxx\Release\program.bat to update the firmware.
Don't forget to disconnect the pads once done.
- FW01: Basic functionality
- FW02: PP16 high speed protocol support, more storage for remote mode frames (14 instead of 8)
- FW03: Minor bugfixes, auto-transmit when plugged into powerbank, weaker red LED when powered by coin cell
Using a non-rechargeable (CR2032) battery
Disconnect the two solder pads next to the push-button to disable the charging circuit:
Enclosure
Print both STL files flat face down, with supports and 10% or more infill. Use a M2*8mm screw for fastening.
Protocol info
This is the top-level serial protocol info to communicate with the ESL Blaster, not the ESL IR protocol itself.
Commands are a single character (byte):
?: Ask for ID string. Replies withESLBlasterXY. X is the hardware revision (A, B, or C), Y is the firmware version (currently 0, 1, 2 or 3).L: Load frame data. Format:LsdrRx.... s: frame size in bytes. d: delay between repeats. r: repeat count low byte. R: repeat count high byte. x: frame data...- In FW02 and above, the highest bit of R is used to indicate PP16 transmission. Repeat max count is therefore reduced to 32767 instead of 65535.
T: Transmit loaded frame. ReturnsKwhen done.S: Emergency stop. Stops any IR transmit operation.W: Start user flash write sequence. Send 1024 bytes in 128 byte blocks, wait forK(ok) orN(error) reply after each block, and one last reply for program ok/fail.R: Read user flash (starts at 0x8007C00). Replies with 1024 bytes.