Show us how you have configured the serial node to give that output. Also I think you had better show us your latest Arduino code.
Yes of course. Serial node has the following form:
And the code of server lora has the following form:
#include <Adafruit_BusIO_Register.h>
#include <Adafruit_I2CDevice.h>
#include <Adafruit_I2CRegister.h>
#include <Adafruit_SPIDevice.h>
#include <SPI.h>
#include <RH_RF95.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>
#include <Fonts/FreeMonoBold12pt7b.h>
RH_RF95 rf95;
int led = 13;
unsigned long int millisBefore;
int turn = 0;
int h, t, mmwaterValue;
#define SCREEN_WIDTH 128 // OLED display width, in pixels
#define SCREEN_HEIGHT 32 // OLED display height, in pixels
// Declaration for an SSD1306 display connected to I2C (SDA, SCL pins)
#define OLED_RESET -1 // Reset pin # (or -1 if sharing Arduino reset pin)
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
void setup()
{
pinMode(led, OUTPUT);
Serial.begin(115200);
while (!Serial) ; // Wait for serial port to be available
if (!rf95.init())
Serial.println("init failed");
rf95.setFrequency(868.0);
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3D for 128x64
Serial.println(F("SSD1306 allocation failed"));
for (;;); // Don't proceed, loop forever
}
// Clear the buffer
display.clearDisplay();
printText();
delay(1500);
}
void loop()
{
// Now wait for a reply
uint8_t buf[RH_RF95_MAX_MESSAGE_LEN];
uint8_t len = sizeof(buf);
if (rf95.waitAvailableTimeout(500))
{
if (rf95.recv(buf, &len))
{
String dataTotal = (char*)buf;
explode(dataTotal);
}
else
{
Serial.println("recv failed");
}
}
printText();
display.display();
delay(300);
display.clearDisplay();
}
void explode(String req) {
char str[20];
req.toCharArray(str, 20);
char * pch;
pch = strtok (str, "-");
while (pch != NULL)
{
String sementara = pch;
turn++;
if (turn == 1) {
//Serial.println(h);
h = sementara.toFloat();
}
if (turn == 2) {
//Serial.println(t);
t = sementara.toFloat();
}
if (turn ==3) {
//Serial.println(mmwaterValue);
mmwaterValue = sementara.toFloat();
}
pch = strtok (NULL, "-");
delay(100);
}
//Serial.println(h);
//delay(5000); // vazoyme to delay etsi wste i node red na ksexwrisei ta dedomena apo to Arduino
//Serial.println(t);
//delay(5000); //vazoyme to delay etsi wste i node red na ksexwrisei ta dedomena apo to Arduino
//Serial.println(mmwaterValue);
//delay(5000); //vazoyme to delay etsi wste i node red na ksexwrisei ta dedomena apo to Arduino
String json = "{\"humidity\": " + String(h) + ", \"temperature\": " + String(t)+ ", \"water\": " +String(mmwaterValue) +" }";
Serial.println(json);
turn = 0;
}
void printText() {
display.setFont(&FreeMonoBold12pt7b);
display.setTextColor(WHITE); // Draw white text
display.setCursor(0, 28); // Start at top-left corner
display.print(t);
display.drawCircle(34, 8, 3, WHITE);
display.setCursor(40, 27);
display.print("C");
display.setCursor(80, 28);
display.print(h);
display.print("%");
}
I have edited your post to add tripple backticks round the code so we can see what is really there.
You said you had configured the node to split on } but you have it splitting on \n
Can you try changing this...
to this...
String json = "{\"humidity\": " + h + ", \"temperature\": " + t + ", \"water\": " + mmwaterValue +" }\n";`
Serial.print(json);
Odd, according to String documentation, concatenating ints was OK.
Please try one more time...
String json = "{\"humidity\": " + String(h) + ", \"temperature\": " + String(t)+ ", \"water\": " +String(mmwaterValue) +" }\n";`
Serial.print(json);
And set the serial node config to split on \n
Try splitting on a gap of 100ms rather than a character and see what you get.
very very strange.
Would you indulge me with these tests?...
TEST 1...
String json = "1,2,3\n";
Serial.print(json);
TEST 2...
String json = String(h) + "," + String(t) + "," + String(mmwaterValue) + "\n";
Serial.print(json);
TEST 3...
String json = "\"humidity\": 1, \"temperature\": 2, \"water\": 3 \n";
Serial.print(json);
TEST 5...
String json = "{\"humidity\": 1, \"temperature\": 2, \"water\": 3 }\n";
Serial.print(json);
yes i will try and i will let you know. By the way in serial mode what have i do? to put split input "after a timeout of 100 ms" or "on the character \n?"
It should work with \n but try both if necessary.
Yes indeed.
Oh, well, at least you have a solution you can use.
So use TEST2 version, feed the COM port to a function node with this code...
var pl = msg.payload.trim();
if(!pl) return null;
var parts = pl.trim().split(",");
if(parts.length < 3) return null;
msg.payload = {
humidity: pl[0],
temperature: pl[1],
water: pl[2]
}
return msg;
--- alternatively ---
If you want 3 individual values with a topic (for MQTT) then ...
var pl = msg.payload.trim();
if(!pl) return null;
var parts = pl.trim().split(",");
if(parts.length < 3) return null;
var msg1 = {
topic: "humidity",
payload: pl[0]
}
var msg2 = {
topic: "temperature",
payload: pl[1]
}
var msg3 = {
topic: "water",
payload: pl[2]
}
return [[msg1, msg2, msg3]];
Oops.
Try this...
var pl = msg.payload.trim();
if(!pl) return null;
var parts = pl.split(",");
if(parts.length < 3) return null;
msg.payload = {
humidity: Number(parts[0]),
temperature: Number(parts[1]),
water: Number(parts[2])
}
return msg;
demo flow...
[{"id":"dfb8f894.a94758","type":"function","z":"8c0d4c46.2bfb5","name":"","func":"var pl = msg.payload.trim();\nif(!pl) return null;\nvar parts = pl.split(\",\");\nif(parts.length < 3) return null;\n\nmsg.payload = {\n humidity: Number(parts[0]),\n temperature: Number(parts[1]),\n water: Number(parts[2])\n}\nreturn msg;","outputs":1,"noerr":0,"initialize":"","finalize":"","x":732,"y":1072,"wires":[["7e7a56b6.ef8648"]]},{"id":"4a2a8e76.9a358","type":"inject","z":"8c0d4c46.2bfb5","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"","payload":"60,22,0","payloadType":"str","x":546,"y":1072,"wires":[["dfb8f894.a94758"]]},{"id":"7e7a56b6.ef8648","type":"debug","z":"8c0d4c46.2bfb5","name":"","active":true,"tosidebar":true,"console":false,"tostatus":true,"complete":"payload","targetType":"msg","statusVal":"payload","statusType":"auto","x":918,"y":1072,"wires":[]}]
Alternative version (separate messages - for MQTT)
var pl = msg.payload.trim();
if(!pl) return null;
var parts = pl.trim().split(",");
if(parts.length < 3) return null;
var msg1 = {
topic: "humidity",
payload: Number(parts[0])
}
var msg2 = {
topic: "temperature",
payload: Number(parts[1])
}
var msg3 = {
topic: "water",
payload: Number(parts[2])
}
return [[msg1, msg2, msg3]];
It works!!! Thank you very very much!!! honestly!!! Tommorow, i might ask you another question, about connection node-red with power bi.
Again, thank you very very much!!!!
You're welcome. Glad it is working for you.
If you do have new (different) questions, please start a new thread instead of asking here.
PS, you should mark one of the posts in this thread as the solution.
ok i will do it!! thank you very much again.
