I'm wondering if maybe a couple sensors have the same address? Anything is possible from China. I think the way to go would be to rule that out, and/or use a simple sketch to see if three sensors can be detected. If you are feeling froggy, you can use a sketch like this which I use on an Arduino:
Code:
#include <OneWire.h>
int inPin = 14; // Connect data to pin A0
//int inPin = 18; // Connect data to pin A4
void setup(void) {
Serial.begin(9600);
listOneWire();
}
void listOneWire(void) {
byte i;
byte present = 0;
byte data[12];
byte addr[8];
pinMode(inPin, INPUT);
OneWire oneWire(inPin);
Serial.print("Looking for 1-Wire devices.\n\r");
while(oneWire.search(addr)) {
Serial.print("\n\rFound 1-Wire device with address:\n\r");
for( i = 0; i < 8; i++) {
Serial.print("0x");
if (addr[i] < 16) {
Serial.print('0');
}
Serial.print(addr[i], HEX);
if (i < 7) {
Serial.print(", ");
}
}
if ( OneWire::crc8( addr, 7) != addr[7]) {
Serial.print("CRC is not valid.\n");
return;
}
}
Serial.print("\n\r\n\rComplete.\r\n");
oneWire.reset_search();
return;
}
void loop(void) {
// Nothing here
}
To use this on the D1 Mini, you'd change the
int inPin = 14; line to be compatible with the D6 assignment from
@Thorrak's board. I think that would be 12. Someone should check me on that. Then you'd also comment out the line in
void listOneWire() which says
pinMode(inPin, INPUT); (I don't think that needs to be specified with the ESP8266). If you monitor the serial port when this starts up you will see a line representing the OneWire address of each connected sensor (only one shown here):
Code:
09:27:30.378 -> Looking for 1-Wire devices.
09:27:30.378 ->
09:27:30.378 -> Found '1-Wire' device with address:
09:27:30.424 -> 0x28, 0xAA, 0x39, 0xBD, 0x37, 0x14, 0x01, 0xDB
09:27:30.471 ->
09:27:30.471 -> Complete.
The idea here being using a very simple setup to see if the physical/electrical configuration will allow you to connect more than two sensors. If this proves out then there's a software issue. If not, there's a hardware/electrical issue.
)... aren't going to see the same results. That's on them, not the technique...
