From 0ee9c8edfa89cb74ad95cc40798968fadb23ee6a Mon Sep 17 00:00:00 2001
From: Benjamin Koch <bbbsnowball@gmail.com>
Date: Mon, 29 May 2023 19:05:37 +0200
Subject: [PATCH] convert Modbus test script to pymodbus (instead of modbus-tk)
---
firmware/rust1/rtumaster_pymodbus.py | 80 ++++++++++++++++++++++++++++
1 file changed, 80 insertions(+)
create mode 100644 firmware/rust1/rtumaster_pymodbus.py
diff --git a/firmware/rust1/rtumaster_pymodbus.py b/firmware/rust1/rtumaster_pymodbus.py
new file mode 100644
index 0000000..15131a6
--- /dev/null
+++ b/firmware/rust1/rtumaster_pymodbus.py
@@ -0,0 +1,80 @@
+#!/usr/bin/env python
+# -*- coding: utf_8 -*-
+
+# based on https://github.com/pymodbus-dev/pymodbus/blob/dev/examples/client_sync.py
+
+import logging
+import time
+import sys
+import pymodbus
+from pymodbus.exceptions import ModbusException
+from pymodbus.client import ModbusSerialClient
+from pymodbus.file_message import FileRecord
+
+PORT = '/dev/ttyUSB0'
+DEVICE_ADDR = 1
+
+logger = logging.getLogger()
+logger.setLevel(logging.INFO)
+log_handler = logging.StreamHandler(sys.stdout)
+#log_handler.setFormatter(logging.Formatter("%(asctime)s\t%(levelname)s\t%(module)s.%(funcName)s\t%(threadName)s\t%(message)s"))
+logger.addHandler(log_handler)
+
+def main():
+ try:
+ client = ModbusSerialClient(
+ port=PORT,
+ timeout=0.2,
+ # Common optional paramers:
+ # framer=ModbusRtuFramer,
+ # timeout=10,
+ # retries=3,
+ # retry_on_empty=False,
+ # close_comm_on_error=False,
+ # strict=True,
+ baudrate=19200,
+ parity="E",
+ )
+ client.connect()
+ logger.info("connected")
+
+ x = client.read_holding_registers(address=1, count=1, slave=DEVICE_ADDR)
+ logger.info("holding reg 1: %s: %r", x, x.registers)
+
+ x = client.read_file_record([
+ # documentation says tuple of: Reference type, File number, Record Number, Record Length
+ # but actually an object is expected:
+ FileRecord(file_number=0, record_number=0, record_length=7),
+ FileRecord(file_number=0, record_number=1, record_length=5),
+ FileRecord(file_number=0, record_number=2, record_length=3),
+ ], slave=DEVICE_ADDR)
+ logger.info("file 0: %s:", x)
+ for r in x.records:
+ logger.info(" %s: %r", r, r.record_data)
+
+ logger.info("Bootloader state partition:")
+ x = client.read_file_record([
+ FileRecord(file_number=1, record_number=int(0x6000/2), record_length=20),
+ ], slave=DEVICE_ADDR)
+ logger.info("file 1 @ bootloader state partition: %s:", x)
+ for r in x.records:
+ logger.info(" %s: %r", r, r.record_data)
+
+ toggle = True
+ while True:
+ logger.info(client.write_coil(address=0, value=toggle, slave=DEVICE_ADDR))
+ toggle = not toggle
+
+ x = client.read_discrete_inputs(address=0, count=5, slave=DEVICE_ADDR)
+ logger.info("read_discrete_inputs: %s: %r", x, x.bits)
+
+ x = client.read_input_registers(address=0, count=25, slave=DEVICE_ADDR)
+ logger.info("read_input_registers: %s: %r", x, x.registers)
+
+ time.sleep(0.1)
+
+ except ModbusException as exc:
+ logger.error("%s", exc)
+
+if __name__ == "__main__":
+ main()
--
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