Arduino, ESP and 1wire thermometers - Cronologia

Renzo: /* Testing */

2016-06-27T09:08:34Z

Testing

2016-06-27T08:02:39Z

Software

2016-06-27T08:02:00Z

hardware wiring

2016-06-27T08:01:41Z

hardware wiring

2016-06-27T07:51:19Z

2016-06-27T07:50:48Z

Testing

2016-06-27T07:46:47Z

Software

2016-06-27T07:19:59Z

2016-06-27T07:16:18Z

2016-06-27T07:15:36Z

← Versione meno recente		Versione delle 09:08, 27 giu 2016
Riga 64:		Riga 64:
	Unplug GP00 otherwise at the next power cycle your ESP will be in "flashing mode" again.		Unplug GP00 otherwise at the next power cycle your ESP will be in "flashing mode" again.
	If GP00 is unconnected, the program is restarted at power up.		If GP00 is unconnected, the program is restarted at power up.
		+
		+	This is the output (one line per second):
		+	<pre>
		+	Temperature: 31.94
		+	Temperature: 31.94
		+	Temperature: 32.00
		+	Temperature: 32.00
		+	Temperature: 32.00
		+	Temperature: 32.00
		+	Temperature: 32.00
		+	Temperature: 32.06
		+	Temperature: 32.25
		+	Temperature: 32.44
		+	Temperature: 32.56
		+	Temperature: 32.69
		+	Temperature: 32.63
		+	Temperature: 32.50
		+	Temperature: 32.44
		+	</pre>
		+
		+	(I touched the thermometer, so the temperature raised).

@@ Riga 29: / Riga 29: @@
 <source lang=C>
 #include <DallasTemperature.h>
 #define ONE_WIRE_BUS 2  // DS18B20 pin

@@ Riga 18: / Riga 18: @@
 [[File: TO-92_Front_with_Pin_Numbers.png|200px]]
-is GND -> GND
+* 1 is GND -> GND
-is DATA -> GP02 on ESP
+* 2 is DATA -> GP02 on ESP
-is 3v3 -> +3V3
+* 3 is 3v3 -> +3V3
 The circuit also needs a 4.7K resistor between DATA e 3v3.

@@ Riga 8: / Riga 8: @@
 Using an [https://www.adafruit.com/product/954 Adafruit like] cable:
-Black -> GROUND
+* Black -> GROUND
-While -> TXD on ESP
+* While -> TXD on ESP
-Green -> RXD on ESP
+* Green -> RXD on ESP
 DO NOT CONNECT THE RED PIN TO YOUR ESP! The red pin is +5V while ESP need +3V3 so either you have a step-down circuit to convert 5V to 3.3V or you'll need another power source of the right voltage for yout ESP.

@@ Riga 19: / Riga 19: @@
 is GND -> GND
-is DATA -> GPIO02 on ESP
+is DATA -> GP02 on ESP
 is 3v3 -> +3V3

← Versione meno recente		Versione delle 07:50, 27 giu 2016
Riga 55:		Riga 55:
	=== Testing ===		=== Testing ===

−	Load the program on you ESP. Remember that to set the ESP in "flashing mode" ~~GPIO must~~ be ~~connected to ground~~ at power-up.	+	Load the program on you ESP. Remember that GP00 must be connected to ground at power-up to set the ESP in "flashing mode".
		+
		+	Open a terminal (e.g. using screen)
		+	<pre>
		+	screen /dev/ttyUSB0 115200
		+	</pre>
		+
		+	... and you'll get the temperature (one reading per second).
		+
		+	Unplug GP00 otherwise at the next power cycle your ESP will be in "flashing mode" again.
		+	If GP00 is unconnected, the program is restarted at power up.

← Versione meno recente		Versione delle 07:46, 27 giu 2016
Riga 52:		Riga 52:
	}		}
	</source>		</source>
		+
		+	=== Testing ===
		+
		+	Load the program on you ESP. Remember that to set the ESP in "flashing mode" GPIO must be connected to ground at power-up.

← Versione meno recente		Versione delle 07:19, 27 giu 2016
Riga 18:		Riga 18:
	[[File: TO-92_Front_with_Pin_Numbers.png\|200px]]		[[File: TO-92_Front_with_Pin_Numbers.png\|200px]]

−	GND -> GND	+	1 is GND -> GND
		+	2 is DATA -> GPIO02 on ESP
		+	3 is 3v3 -> +3V3
		+
		+	The circuit also needs a 4.7K resistor between DATA e 3v3.
		+
		+	=== Software ===
		+
		+	Here is the source code.
		+	<source lang=C>
		+	#include <DallasTemperature.h>
		+
		+	const int led=13;
		+
		+	#define ONE_WIRE_BUS 2 // DS18B20 pin
		+	OneWire oneWire(ONE_WIRE_BUS);
		+	DallasTemperature DS18B20(&oneWire);
		+
		+	void setup(void){
		+	Serial.begin(115200);
		+	pinMode(led, OUTPUT);
		+	digitalWrite(led, 0);
		+	}
		+
		+	void loop(void){
		+	float temp;
		+	DS18B20.requestTemperatures();
		+	temp = DS18B20.getTempCByIndex(0);
		+	Serial.print("Temperature: ");
		+	Serial.println(temp);
		+
		+	delay(1000);
		+	}
		+	</source>

@@ Riga 16: / Riga 16: @@
 The connection to the DS18B10 is simple:
-[[File: TO-92_Front_with_Pin_Numbers.png]]
+[[File: TO-92_Front_with_Pin_Numbers.png|200px]]
 GND -> GND