Arduino is a open-source microcontroller kit with in-built PWM generators and Analog to Digital Converters (ADCs). This is a development environment that allows you to program your Arduino kit. You need to learn the programming language; this is quite easy with the sample codes that come with it. Included in the tutorial are a pair of Arduino examples, which demonstrate how to use the mux for both digital output and analog input. Arduino 1.6.9 SparkFun. The latest version of Arduino is 1.8.13, released on. It was initially added to our database on. The most prevalent version is 1.8.9, which is used by 20% of all installations. Using a Bipolar Power Supply. The 74HC4051 supports bi-polar power supplies, with a positive supply on V CC and a negative supply on V EE.The difference between V CC and V EE can be as much as 10V (e.g. ±5V), but V CC must be somewhere between 2V and 10V. To use a bipolar supply, you must first open JP1, disconnecting V EE from GND. A quick hit of a soldering iron on some solder wick should.
- Sun May 29, 2016 2:45 am#48188 I have connected a DS1307 Real-time clock module to a WeMOS D1 Mini via the I2C bus and (using 1.6.5 and 2.10rc2) have had 2 test programs working properly to set the clock and another to read the clock.I have upgraded to 1.6.9 and 2.2.0 and get some weird errors without changing any of the code.
I have the line #include <DS1307RTC.h> at the top of the code (interestingly the name does not highlight in red as all the other header names do). This header pulls in Time.h and Wire.h.
Now, it doesn't matter whether I explicitly #include <Time.h> or not, I get errors saying that the type tmElements_t has not been declared WHICH IS DEFINITELY DECLARED IN Time.h - BTW I get no messages saying that Time.h cannot be found.
BUT if I copy the typedef from Time.h and paste it at the top of the .ino file, those error messages go away.
IT GETS BETTER.
Arduino 1.6.9 Download Windows 10
Further down in my .ino file I use a macro tmYearToCalendar(Y) which is also declared in Time.h and which is now reported as not declared when I compile my .ino file.So I copy and paste the macro into my .ino file and - I CAN'T BELIEVE IT! now the compiler is again reporting that the tmElements_t type has not been declared when there is the declaration at the top on the .ino file.
Below is the .ino file. Let me know if you also want to see the libraries involved. If so, I'll try to zip them up and attach them to a post.
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// #include <Wire.h>
// #include <Time.h>
#include <DS1307RTC.h>
typedef struct {
uint8_t Second;
uint8_t Minute;
uint8_t Hour;
uint8_t Wday; // day of week, sunday is day 1
uint8_t Day;
uint8_t Month;
uint8_t Year; // offset from 1970;
} tmElements_t, TimeElements, *tmElementsPtr_t;
// #define tmYearToCalendar(Y) ((Y) + 1970) // full four digit year
void setup() {
Serial.begin(115200);
while (!Serial) ; // wait for serial
delay(200);
Serial.println('DS1307RTC Read Test');
Serial.println('-------------------');
}
void loop() {
tmElements_t tm;
if (RTC.read(tm)) {
Serial.print('Ok, Time = ');
print2digits(tm.Hour);
Serial.write(':');
print2digits(tm.Minute);
Serial.write(':');
print2digits(tm.Second);
Arduino 1.6.9
Serial.print(', Date (D/M/Y) = ');Serial.print(tm.Day);
Serial.write('/');
Serial.print(tm.Month);
Serial.write('/');
Serial.print(tmYearToCalendar(tm.Year));
Serial.println();
} else {
if (RTC.chipPresent()) {
Serial.println('The DS1307 is stopped. Please run the SetTime');
Serial.println('example to initialize the time and begin running.');
Serial.println();
} else {
Serial.println('DS1307 read error! Please check the circuitry.');
Serial.println();
}
delay(9000);
}delay(1000);
}
void print2digits(int number) {
if (number >= 0 && number < 10) {
Serial.write('0');
}
Serial.print(number);
}