ramzes642 / pi-rs485-driver-modbus-ascii

Innovert 3-phase engine controller driver

pi-rs485-driver-modbus-ascii

Driver for innovert 3-phase engine controller

Tested on ISD222M21B

Special build for Raspberry Pi, using onboard serial and software RTS flow-control

Install

Raspberry-Pi

Get dependencies

sudo apt-get install gcc wiringpi

Build

./build.sh

Usage samples

# Start engine (enable)
./driver -e
# Stop engine (disable)
./driver -d
# Set 40 Hz frequency
./driver -f 40

# Start second controller (id 2)
./driver -e -i 2

# Use another uart
./driver -e -s /dev/ttyAMA0

Sample device

Wiring

Use chip ADM1485JNZ or similar

TX(8 pin) to DI
RX(10 pin) to RO
RTS(11 pin) to RE/DE (connect them together on chip)
VCC to raspberry's 5V, GND

A/B then can be connected to engine controller RS+/RS-

Controller setup

PH00 = 1 (9600 spd)
PH01 = 0 (8N1 ASCII)
PH02 = 1 (controller id)
Pb01 = 5 (frequency setup via rs485)
Pb02 = 2 (start/stop via rs485)