arduino obd2

Summarize the experience of wireless module debugging. There are already people on the Arduino who have made the library of this module, but according to the manual written also has a certain reference significance.Wireless module is one of the modules that I think is more difficult to debug, because it is a module of mutual interaction, communication failure has two reasons, can not be found from a single code. The code is written, and all sorts of i

I. List of components Arduino Pro Mini GY-30 Second, the wiring Using IIC communication mode, GY-30VCC connect +5v,gnd grounding. GY-30 SDA, SCL respectively A4, A5 Third, the source code #include

() { //forward forward digitalwrite (Input1,high);//Give High Level digitalwrite (input2,low); Give low Level digitalwrite (Input3,high);//Give High Level digitalwrite (input4,low); Give low -level delay (+) ; Delay 1 seconds//stop stop digitalwrite (Input1,low); Digitalwrite (input2,low); Digitalwrite (Input3,low); Digitalwrite (input4,low); Delay (+); Delay 0.5 seconds //back backward turn digitalwrite (input1,low); Digitalwrite (Input2,high); Digitalwrite (input3,low);

thisexampleFunctions can also handle negative numbers, such asy = map (x, 1, 50, 50,-100);is also valid and works well.Also effective and correctThe map () function uses integer math so would not be generatefractions when the math might indicate that it should does so. Fractional remainders is truncated, and is not rounded oraveraged.The map () function uses integral types, so no fractions are generated, and fractions are truncated, not full or average (?). ）Parameters parametersValue:the numbe

; //after a frame time delay, go to the next frame if(Millis ()-Lasttick >=framedelayms) {Lasttick=Millis (); ++frame; if(Frame >=frame_num) FRAME=0; } showarrpic (Man[frame]);}//display the picture represented by the arrayvoidShowarrpic (Const bytearr[]) { for(unsignedChari =0; i i) {digitalwrite (Latchpin, low); Shiftout (Datapin, Clockpin, Lsbfirst, (byte) arr[i]); Shiftout (Datapin, Clockpin, Lsbfirst, (byte) row[i]); Digitalwrite (Latchpin, high); }}No painting, this is all manual

registers is 2+1=3writespi_cs1180 (0x52);writespi_cs1180 (0x06); //Gain 64writespi_cs1180 (0x01); //normal use, configuration 01writespi_cs1180 (0x24); //BipolarDELAY5MS ();Delay (5);while (Drdy);while (Drdy);while (Digitalread (Drdy) ==high);while (Digitalread (Drdy) ==high);Readspi_cs1180 (); //empty read once, do discard processing, because the first reading is not correctDELAY5MS ();Delay (5);}Read AD valuevoid getad_cs1180 (){unsigned char ad[3];while (Drdy);while (Digitalread (Drdy) =

OverviewDemonstrates the control of a unipolar stepper motor. Without a ready-made H-bridge module, the bipolar stepper motor does not experiment.There is no use of the stepper library, rough primitive drive with IO, more understanding of stepper motor drive.Example program full-step driver----------------------------------------------------------------------------//Unipolarsteppertest_ fullstep.ino////Created 2015-06-27//by Seesea Half-Step Drive ------------------------------------------------

(F, low); digitalwrite (G, high ); delay( 300); digitalwrite (A, high); digitalwrite (B, high); digitalwrite (C, high); digitalwrite (D, high); digitalwrite (E, high ); digitalwrite (F, High); delay (300); // fully bright digitalwrite (A, high); digitalwrite (B, high); digitalwrite (C, high); digitalwrite (D, high); digitalwrite (E, high); digitalwrite (F, High); digitalwrite (G, high); digitalwrite (H, high); digitalwrite (D1, low ); digitalwrite (D2, low); digitalwrite (D3, low); digitalwrite

The entire tutorial makes an HTTP client for uploading Yeelink data points.1 Get Account http://www.cnblogs.com/imfanqi/p/4419915.html2 Code Tutorial http://www.windworkshop.cn/?p=1217#include 　　Arduino IDE for ESP8266 Tutorial (iii) HTTP client

(Exception e) {recvmessageclient = "Receive exception:" + e.getmessage () + "\ n";//message Wrap msg = new messages (); Msg.what = 0; Mhandler.sendmessage (msg); }} Handler Mhandler = new Handler () {public void Handlemessage (message msg) {super.handlemessage (msg); if (Msg.what = = 0) {Toast.maketext (Getactivity (), Recvmessageclient,toast.length_short). Show ();//refresh message mechanism} else if ( Msg.what = = 1) {try {String result = recvmessageclient; Toast.maketext (Getactivity (), R

Analogread (), and the detected voltage (0-5V) is mapped to a digital (0-1023) by a number-to- analog conversion technology (ADC) . If the output of the piezoelectric element exceeds a certain limit value (indicating that the vibration has reached a certain strength) your board will be output through the serial port "detected vibration." "This string to the computer. You need to open the serial monitor to see the effect. complete the hardware device required for this example An

Thermistor Connection method: Resistance: / * * thermistor model is NTC glass-sealed thermal resistor mf58-104f 3950K interpolation 100K accuracy 1% b value 3950 * Room temperature 25 degrees Celsius (298.15K) resistance is 100k euro */ #

[Csharp]/*************************************** **************************** Program name: Mega_ADK ADC** Parameter count: None** Function: Send the voltage value (mv) collected by AD through the serial port)** Note: The target board is Maga adk

The simplest example:   Void setup () { Serial. Begin (9600); // open the serial port and set the baud rate to 9600 bps. } Void loop () { Int val; Val = analogread (5 );//The sensor is connected to the analog Port 5, and the value is

Modify the SSID and passwd, the program burned to 8266, waiting for the serial port to return the successful connection message, after the successful connection can see the return of an IP address, using the browser azimuth this IP address can see

void Setup () {} void Loop () {} small light flashing void Setup () {Pinmode (2,output);} void Loop () {Digitalwrite (2,lo W);//light delay (1000); Digitalwrite (2,high);//Control PIN level delay (1000); /////////////////////////////////////////////

#include #include #include #include #include & Lt mailbox.h> #include #include #include #include IPAddress Server (10,0,0,9); Yunclient client; String Parametri = ""; String of POST parameters void Setup () {bridge.begin

After the study number two #define COM_HEAR 2 #define COM_SOUND 3 #define Com_speak 4 void Setup () {Pinmode (Com_sound, OUTPUT); Pinmode (Com_speak, OUTPUT); Pinmode (Com_hear, INPUT); Serial.begin (9600); } void Loop () {int I, j, K; int

Using the library's tasks feature, there are three things to do first: First: Reference Library#include "SCoop.h""Library File Download

Human infrared module is very simple, is the normal three-pin (vcc,gnd,data), the data is high, low level, that is, there are only two results: High level for the active body is detected, low level for no active human detection. It is important to