node-optommp

Opto22MMP client written in javascript. Allows access to Opto22 groov EPIC processors using the OptoMMP protocol directly from nodejs. This was adapted from the python toolkit, so if you need the same thing in python go here.

Getting Started

Install with npm

npm install node-optommp

Instantiating the client

const O22MMP = require('node-optommp')
const host = '192.168.1.1'
const client = new O22MMP(host) ##omit host to connect to localhost 

All read and write methods return promises:

• ReadRawOffset(offset, size, data_type) - Rads the raw address at offset collecting size bytes and using data_type formatting to unpack it.

• LastError() - Returns the last error response code.

• UnitDescription() - Returns the device unit description. For example, GRV-EPIC-PR1

• FirmwareVersion() - Returns the device firmware version. For example, 'R1.1a'

• IPAddressE0() - Returns the IP address associated with Ethernet 0 on the controller.

• MACAddressE0() - Returns the MAC address associated with Ethernet 0 on the controller.

• IPAddressE1() - Returns the IP address associated with Ethernet 1 on the controller.

• MACAddressE1() - Returns the MAC address associated with Ethernet 1 on the controller.

• SetDigitalPointState(module, channel, state) - The HD digital output at channel on module will be toggled to state, which should be either 1 or 0. Returns status code.

• GetDigitalPointState(module, channel) - The state of the HD digital output at channel on module will be fetched. Returns state either 1 or 0.

• GetAnalogPointValue(module, channel) - Return the current float value of the analog I/O installed at channel on module.

• SetAnalogPointValue(module, channel, value) - Set the analog I/O installed at channel on module to be value. value should be a float.

• GetAnalogPointMin(module, channel) - Return the minimum float value of the analog I/O installed at channel on module.

• GetAnalogPointMax(module, channel) - Return the maximum float value of the analog I/O installed at channel on module.

• GetScratchPadIntegerArea(index) - Returns the indexth scratch pad integer.

• SetScratchPadIntegerArea(index, value) - Sets the indexth scratch pad integer to be value.

• GetScratchPadFloatArea(index) - Returns the indexth scratch pad float.

• SetScratchPadFloatArea(index, value) - Sets the indexth scratch pad float to be value.

• GetScratchPadStringArea(index) - Returns the indexth scratch pad string.

• SetScratchPadStringArea(index, data) - Sets the indexth scratch pad string to be data.

• UnpackReadResponse(data, data_type) - Unpacks the string data from bytes 16-20 of a read response. Returns formatted data. data_type --> struct format characters 'c', 'i', 'd', 'f', etc., or specifically 'FIRMWARE', 'IP', or 'MAC' for custom formatting, or 'NONE' for raw binary data.

• UnpackWriteResponse(data) - Unpacks the integer status code from bytes 4-8 of a write response. Returns int status.

• PackFloat(value) - Packs floating point vlaue into a four-byte hexidecimal array.

• PackInteger(value) - Packs integer point vlaue into a four-byte hexidecimal array.

• ReadBlock(address) - Read value at memory location address. Relies on BuidReadBlockRequest(), wraps up .send() and .recv() methods. Returns unpacked string data.

• WriteBlock(address, value) - Write value into memory location address. Relies on BuildWriteBlockRequest(), wraps up .send() and .recv() methods. Returns int status.

• BuildReadBlockRequest(dest, size) - Build the read block request bytearray. Returns bytearray block. This is an internally used utility method to build a read request. Client code isn't likely to need it.

• BuildWriteBlockRequest(dest, value) - Build the write block request bytearray. Returns bytearray block. This is an internally used utility method to build a read request. Client code isn't likely to need it.

• close() - Closes the socket connection to the device. Call this before the end of the script.