eFirmata

Connecting the real world to the digital world.

Introduction

Compatable Hardware:

• mbed
• LPCXpresso 1769
  (from NXP)
• LPC1768-Xplorer
  (from NGX)

Protocols:

• GPOut over UDP
• GPIn over UDP
• PWM over UDP
• Triggered Oscilloscope over UDP
• SPI over UDP

Example Projects:

• RGB lights controlled from a smartphone
• Triggered oscilloscope

Compiler

Installing the Binary

About / Credits / Contact

Protocol - GP Input over UDP (port 2115)

GPI - Get GPIO pin values

GPI command from the PC to the eFirmata

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
'e'								'F'								'i'								'r'
'm'								'a'								't'								'a'
'G'								'P'								'I'								Version = 0

Response

The eFirmata will respond with the pin values of all GPIO pins.

pin data from the eFirmata to the PC (big endian)

00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
GPIO 0 Pin Values
GPIO 1 Pin Values
GPIO 2 Pin Values
GPIO 3 Pin Values
GPIO 4 Pin Values

This data is the result of reading FIOPIN for each of the GPIO ports.