Please help! Heltec CubeCell HTCC-AB01 with DS18B20 on TTN (LoRaWAN)

[jannik]

Hello Heltec Community,
I am looking for a working code for my Heltec CubeCell HTCC-AB01. I would like to get the temperature on TTN with a DS18B20 and my Heltec CubeCell HTCC-AB01, has anyone done anything for that?

Thanks in advance
Jannik

[jasonXu]

hi,

We haven’t adapted this sensor yet.

you can refer this code:

HelTecAutomation/ASR650x-Arduino

[jannik]

Hello jasonXu,
thank you for your answer.

[jasonXu]

hi,

and you can refer these talking:

Cubecell DS18B20 Lorawan

puc is only a variable name for the unsigned char the values are stored in. this variable contains 4 bytes in an array. you can decode that array in ttn with: function bytesToInt(by) { f = by[0] | by[1]<<8 | by[2]<<16 | by[3]<<24; return f; } function bytesToFloat(by) { var bits = by[3]<<24 | by[2]<<16 | by[1]<<8 | by[0]; var sign = (bits>>>31 === 0) ? 1.0 : -1.0; var e = bits>>>23 & 0xff; var m = (e === 0) ? (bits & 0x7fffff)<<1 : (bits & 0x7fffff) | 0x800000; var f = sign * …

Cubecell won't find DS18B20

I have a working DS18B20 sensor (works fine on a Wireless Stick). When I try it on the CubeCell capsule it just reports -127. I have it connected to GPIO, Vext, & GND. I’ve tried the onewiresearch sketch and that doesn’t find it either. What am I doing wrong? Thanks. Code is below: // Include the libraries we need #include “LoRaWan_APP.h” #include “Arduino.h” #include <OneWire.h> #include <DallasTemperature.h> #define timetillsleep 1000 #define timetillwakeup 100*60 static TimerEve…

[Druilhe]

Hello, about the connection for a DS18B20 probe to a CubeCell HTCC-AB01, you need to develop your own function using GPIO control as this example which is in function with these devices :

/* Write function for only one byte on the OneWire bus. LSB transmitted first. /
/ for (mask = 00000001; mask>0; mask <<= 1) { //iterate through bit mask with byte mask = 1; /
/ Mesaures: Duration of slot one between two falling edge is 68 µs using parameters below. /
/ Duration of slot zero between two falling edge is 69,6 µs using parameters below. */
void WriteByte(uint8_t MyByte, Probe_t ProbeSelected) {
uint8_t mask = 0x01;
uint8_t k;
noInterrupts();
switch (ProbeSelected) {
case Probe1:
pinMode(DS18S20Pin_GPIO0, OUTPUT);
for (k = 0; k < 8; k++) {
digitalWrite(DS18S20Pin_GPIO0, LOW); // falling edge to start the Slot OneWire
if ((MyByte & mask) != 0) { // at initial time mask = 0x01
delayMicroseconds(4);
digitalWrite(DS18S20Pin_GPIO0, HIGH); // 7 µs measured
pinMode(DS18S20Pin_GPIO0, INPUT_PULLUP);
delayMicroseconds(20); // with the control of GPIO, the complete delay is 65 µs before the next falling edge
pinMode(DS18S20Pin_GPIO0, OUTPUT);
} else {
delayMicroseconds(60);
digitalWrite(DS18S20Pin_GPIO0, HIGH);
delayMicroseconds(2);
}
mask <<= 1; // mask = mask << 1;
}

Do not worry I send you the github URL link before the end of the week for a solution which is in use.

[Druilhe]

Hello, With delay i propose you a solution among several to retrieve the measure sended from a DS18B20 probe. First it is not possible to recognize the correct timing without an oscilloscope. I send you a link about a project which use DS18B20 probes connected on a CubeCell HTCC-AB01. The connection to the gateway is in OTAA mode and you will find functions which should answer maybe to your problem.

JLDR/MoistureProbeCubeCell

Best regards.

Blockquote