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tests: Add initial test case for Modbus server
Includes new test group for the modbus server, alongside the initial test case where the modbus server is coneceted to by a client on the github action's runner. Currently, the github actions runner connects to the modbus server to read and write to the LED and Button register(s). Will need to update test case as registers are implemented in the modbus server container. This commit also includes changes in tests.yml in order to run the test group and store the github artifact. Signed-off-by: Matthew Gee <mgee@iol.unh.edu>
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‎.github/workflows/tests.yml‎

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with:
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name: "FlashValidation.log"
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path: /tmp/flashValidation.log
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- name: Modbus Server Validation Tests
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run: |
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cd tests && bash beginTests.sh "modbusServerValidation"
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- name: Print Modbus Server Validation Logs
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if: always()
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run: cat /tmp/modbusServerValidation.log
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- name: Upload log file as artifact
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if: always()
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uses: actions/upload-artifact@v4
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with:
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name: "ModbusServerValidation.log"
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path: /tmp/modbusServerValidation.log
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‎tests/groups/modbusServerValidation/clean.sh‎

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echo "Cleanup is complete"

‎tests/groups/modbusServerValidation/config.json‎

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{
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"name": "Modbus Server Validation",
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"description": "Test the Ocre Modbus server ",
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"setup": [
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{
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"name": "Modbus Server Validation Setup",
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"exec": "bash setup.sh"
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}
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],
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"test_suites": [
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{
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"name": "Modubs Validation Tests",
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"description": "Tests the modbus server container runtime",
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"board" : "b_u585i_iot02a",
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"test_cases": [
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{
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"name": "Check Modbus communication with remote client",
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"exec": "./modbusServer_validation_remote.py"
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},
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{
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"name": "Check Modbus communication with local client",
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"exec": ""
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}
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]
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}
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],
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"cleanup": [
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{
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"name": "Modbus Server Validation Cleanup",
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"exec": "bash clean.sh"
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}
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]
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}

‎tests/groups/modbusServerValidation/modbusServer_validation_remote.py‎

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#!/usr/bin/env python3
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import serial
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import time
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import sys
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from pymodbus.client import ModbusTcpClient
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def exitSafe(conn: serial.Serial, client: ModbusTcpClient, exitCode: int):
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conn.close()
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client.close()
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sys.exit(exitCode)
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"""
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This testcase is to be used following a modbus server being installed on a board.
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The testcase forms a serial connection to the board, sends a break to start the Modbus server,
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and reads / writes to registers on the modbus server through a connection on the testing agent
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"""
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def main():
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print("starting Modbus server:")
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conn = serial.Serial('/dev/ttyACM0', 115200, timeout=1)
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conn.send_break(duration=1)
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# Wait for modbus server to be up
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time.sleep(5)
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print("----* Reading client connection status *----")
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client_remote = ModbusTcpClient("132.177.122.245", port=1502)
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client_remote.connect()
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connection_results = [client_remote.connected, client_remote.is_socket_open()]
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print(connection_results)
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if (connection_results != [True, True]):
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exitSafe(conn, client_remote, 1)
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print("----* Testing LED Control Register *----")
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led_results = []
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led_results.append(client_remote.read_holding_registers(0x00).registers[0]) # 0
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client_remote.write_register(0x00, 0x01)
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time.sleep(5)
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led_results.append(client_remote.read_holding_registers(0x00).registers[0]) # 1
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client_remote.write_register(0x00, 0x02)
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time.sleep(5)
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led_results.append(client_remote.read_holding_registers(0x00).registers[0]) # 2
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client_remote.write_register(0x00, 0x00)
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time.sleep(5)
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led_results.append(client_remote.read_holding_registers(0x00).registers[0]) # 0
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print(led_results)
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if (led_results != [0,1,2,0]):
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exitSafe(conn, client_remote, 1)
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print("----* Test Button Press Count Register *----")
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button_result = (client_remote.read_holding_registers(0x01).registers[0]) # 0
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if button_result != 0:
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exitSafe(conn, client_remote, 1)
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print("----* Waiting for updates to Modbus server container before continuing *---")
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# print("----* Test reading 32 bit floats *----")
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# print("Acceleration X")
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# print(client_remote.convert_from_registers([0x04, 0x05], client_remote.DATATYPE.FLOAT32, word_order="little"))
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# print(client_remote.read_holding_registers(0x04).registers)
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# print(client_remote.read_holding_registers(0x05).registers)
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# print(client_remote.read_input_registers(0x04).registers)
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# print(client_remote.read_input_registers(0x05).registers)
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# print("Gyroscope X")
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# print(client_remote.convert_from_registers([0x08, 0x09], client_remote.DATATYPE.FLOAT32, word_order="little"))
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# print(client_remote.read_holding_registers(0x08).registers)
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# print(client_remote.read_holding_registers(0x09).registers)
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# print(client_remote.read_input_registers(0x08).registers)
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# print(client_remote.read_input_registers(0x09).registers)
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# print("Humidity")
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# print(client_remote.convert_from_registers([0x14, 0x15], client_remote.DATATYPE.FLOAT32, word_order="little"))
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# print(client_remote.read_holding_registers(0x14).registers)
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# print(client_remote.read_holding_registers(0x15).registers)
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# print(client_remote.read_input_registers(0x14).registers)
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# print(client_remote.read_input_registers(0x15).registers)
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# print("Temperature")
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# print(client_remote.convert_from_registers([0x16, 0x17], client_remote.DATATYPE.FLOAT32, word_order="little"))
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# print(client_remote.read_holding_registers(0x16).registers)
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# print(client_remote.read_holding_registers(0x17).registers)
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# print(client_remote.read_input_registers(0x16).registers)
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# print(client_remote.read_input_registers(0x17).registers)
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print("----* Closing Connection *----")
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exitSafe(conn, client_remote, 0)
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if __name__ == "__main__":
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main()
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‎tests/groups/modbusServerValidation/setup.sh‎

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# Assumes board is being flashed with both hello world and modbus-server
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echo "Setup is complete"

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