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Update README.md
This commit is contained in:
Yoonseok Hur
GitHub
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commit
534e0790ef
@ -56,21 +56,289 @@ Send the request message in `msg.payload` as you would do with a serial out node
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For consistency with the serial in node, msg.port is also set to the name of the port selected.
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### Port Select
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### Serial Control
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When you start the node-red, the flow(program) picks up the pre-programmed serial port, open it, and start the communication. But there are some cases the port needs to switch to a different port, stop, and start again. For example, in order to upload a new binary for Arduino, the serial port needs to be stopped relased from the nodered, and start it again after uploading. Or when the FTDI device re-connects after disconnected for any reason, it may be possible the port number change, and the end user of the flow can't change the port.
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Provides the capability to change the serial ports on the run time programatically.
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When you start the node-red, the flow(program) picks up the pre-programmed serial ports and open them. But when a device re-connects after disconnecting for any reason, it may be possible the port number change, and the end user of the flow can't change the port. With this `port selection node`, it's possible to let the user change the port while running the program by sending a message like this.
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This `Serial Control` node provides the serial port control capability to
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1. stop the communication and releasing the serial port so, for example the Arduino can upload the new binary without shutting down the nodered.
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2. start the communication after stopped with this `Serial Control` node for above reason or the like.
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3. change the serial port and the configuration on the run time programatically.
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4. query the serial port configuration.
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In order to control the communication, just send these JSON messages to the control node.
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To stop
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```json
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{
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"port": "/dev/tty.usbmodem1234561",
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"serialbaud": 115200,
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"databits": 8,
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"parity": "none",
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"stopbits": 1
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}
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"stop":""
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}
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```
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To start
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```json
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{
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"stop":""
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}
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```
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https://github.com/yhur/node-red-nodes/assets/13171662/5d5f2e7b-0cc8-421c-ad05-6361a4ececdd
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To change the port configuration
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```json
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{
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"config" : {
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"newport": "/dev/tty.usbmodem1234561",
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"serialbaud": 115200,
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"databits": 8,
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"parity": "none",
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"stopbits": 1
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}
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}
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```
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To query the port configuration
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```json
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{
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"config":"query"
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}
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```
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**Here is the serial control node usage example flow**
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[
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{
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"id": "15bb070145462321",
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"type": "inject",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "AC026GAO,57600",
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"props": [
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{
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"p": "payload"
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},
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{
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"p": "topic",
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"vt": "str"
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}
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],
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"repeat": "",
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"crontab": "",
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"once": false,
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"onceDelay": 0.1,
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"topic": "",
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"payload": "{\"config\":{\"newport\":\"/dev/tty.usbserial-AC026GAO\",\"serialbaud\":57600,\"databits\":8,\"parity\":\"none\",\"stopbits\":1}}",
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"payloadType": "json",
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"x": 250,
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"y": 600,
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"wires": [
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[
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"cf47565c5a2fea27"
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]
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]
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},
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{
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"id": "1efa4bdcfff37d75",
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"type": "debug",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "debug 20",
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"active": true,
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"tosidebar": true,
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"console": false,
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"tostatus": false,
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"complete": "true",
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"targetType": "full",
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"statusVal": "",
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"statusType": "auto",
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"x": 780,
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"y": 680,
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"wires": []
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},
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{
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"id": "f173dab817b51d1c",
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"type": "inject",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "usbmodem1234561",
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"props": [
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{
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"p": "payload"
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},
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{
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"p": "topic",
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"vt": "str"
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}
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],
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"repeat": "",
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"crontab": "",
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"once": false,
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"onceDelay": 0.1,
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"topic": "",
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"payload": "{\"config\":{\"newport\":\"/dev/tty.usbmodem1234561\"}}",
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"payloadType": "json",
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"x": 250,
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"y": 640,
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"wires": [
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[
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"cf47565c5a2fea27"
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]
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]
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},
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{
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"id": "cf47565c5a2fea27",
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"type": "serial control",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "",
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"serial": "b720bb12479b6ef1",
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"x": 570,
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"y": 680,
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"wires": [
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[
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"1efa4bdcfff37d75"
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]
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]
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},
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{
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"id": "e0aeaaebcd81fd25",
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"type": "inject",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "",
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"props": [
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{
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"p": "payload"
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},
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{
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"p": "topic",
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"vt": "str"
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}
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],
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"repeat": "",
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"crontab": "",
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"once": false,
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"onceDelay": 0.1,
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"topic": "",
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"payload": "{\"stop\":\"\"}",
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"payloadType": "json",
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"x": 220,
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"y": 680,
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"wires": [
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[
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"cf47565c5a2fea27"
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]
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]
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},
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{
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"id": "2118ff6fce99b134",
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"type": "inject",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "",
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"props": [
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{
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"p": "payload"
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},
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{
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"p": "topic",
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"vt": "str"
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}
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],
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"repeat": "",
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"crontab": "",
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"once": false,
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"onceDelay": 0.1,
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"topic": "",
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"payload": "{\"start\":\"\"}",
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"payloadType": "json",
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"x": 220,
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"y": 720,
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"wires": [
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[
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"cf47565c5a2fea27"
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]
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]
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},
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{
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"id": "fbea9cf5dbac9f0b",
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"type": "inject",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "",
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"props": [
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{
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"p": "payload"
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},
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{
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"p": "topic",
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"vt": "str"
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}
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],
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"repeat": "",
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"crontab": "",
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"once": false,
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"onceDelay": 0.1,
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"topic": "",
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"payload": "{\"config\":\"query\"}",
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"payloadType": "json",
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"x": 250,
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"y": 760,
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"wires": [
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[
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"cf47565c5a2fea27"
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]
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]
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},
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{
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"id": "673064b652dde3d2",
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"type": "serial in",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "",
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"serial": "b720bb12479b6ef1",
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"x": 190,
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"y": 540,
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"wires": [
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[
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"13f27a28eda0df50"
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]
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]
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},
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{
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"id": "13f27a28eda0df50",
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"type": "debug",
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"z": "53ca91fecd4b75bb",
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"g": "c67578985101f329",
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"name": "debug 21",
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"active": true,
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"tosidebar": true,
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"console": false,
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"tostatus": false,
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"complete": "false",
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"statusVal": "",
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"statusType": "auto",
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"x": 780,
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"y": 540,
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"wires": []
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},
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{
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"id": "b720bb12479b6ef1",
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"type": "serial-port",
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"name": "s1",
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"serialport": "/dev/tty.usbmodem1234561",
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"serialbaud": "115200",
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"databits": "8",
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"parity": "none",
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"stopbits": "1",
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"waitfor": "",
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"dtr": "none",
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"rts": "none",
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"cts": "none",
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"dsr": "none",
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"newline": "\\n",
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"bin": "false",
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"out": "char",
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"addchar": "",
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"responsetimeout": "10000"
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}
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]
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