[HELP]using code 5 to write modbus single coil is always on

Describe the issue To write a Modbus single coil, how do you configure modbus.json and what is the data format of the RPC node? Hope to get your guidance.

I can successfully write single hold register with RPC node and modbus.json

Configuration (Attach your configuration file) Here is the configuration for successfully writing a single hold register RPC script conversion node and modbus.json

var request = {};
request.method = "writeSingleRegister";
request.params = 10;
return {msg: request, metadata: metadata, msgType: msgType};

"rpc": [
          {
            "tag": "writeSingleRegister",
            "type": "16int",
            "functionCode": 6,
            "objectsCount": 1,
            "address": 0
          }
        ]

The following are the conversion node scripts and modbus.json configurations that cannot be written to a single coil

var request = {};
request.method = "writeSingleCoil";
request.params = [0];
return {msg: request, metadata: metadata, msgType: msgType};

"rpc": [
          {
            "tag": "writeSingleCoil",
            "type": "bits",
            "functionCode": 5,
            "objectsCount": 1,
            "address": 3
          }
        ]

Modbus slave Communication Traffic Tabs received the following:

Rx:031524-00 0A 00 00 00 06 01 05 00 03 FF 00
Tx:031525-00 0A 00 00 00 06 01 05 00 03 FF 00

No matter what message I send, it receives FF instead of 00.

I've also tried the following

var request = {};
request.method = "writeSingleCoil";
request.params = 0;
return {msg: request, metadata: metadata, msgType: msgType};

"rpc": [
          {
            "tag": "writeSingleCoil",
            "type": "16uint",
            "functionCode": 5,
            "objectsCount": 1,
            "address": 3
          }
        ]

"rpc": [
          {
            "tag": "writeSingleCoil",
            "type": "16int",
            "functionCode": 5,
            "objectsCount": 1,
            "address": 3
          }
        ]

Connector name (If you need help with some connector/converter): Modbus Connector

Error traceback (If it was raised):

Versions (please complete the following information):

OS: macOS Catalina 10.15.6
Thingsboard IoT Gateway version 2.5.5.2
Python version 3.7
Source code compilation and run

thingsboard / thingsboard-gateway

[HELP]using code 5 to write modbus single coil is always on #484