configure: error: no libevent found

# apt-get install libevent-dev

Arduino DHT22 Wiring Example

References :
Arduino DHT22 (AM2302) Tutorial + Library + Wiring

ImportError: No module named serial

# apt-get install python-serial

References :
python - ImportError: No module named serial - Stack Overflow

在 Arduino 使用 SoftwareSerial

由於 Arduino UNO, Nano, Pro mini 只有一組 Serial Port，若接上 RS232 設備後則無法透過電腦 debug，所以可透過 SoftwareSerial 使用其他 port 來連接設備




References :
小狐狸事務所: Arduino 串列埠測試 (UART)
Arduino - SoftwareSerialExample

Arduino avrdude stk500_getsync(): not in sync resp=0x30 error

References :
Solution: avrdude stk500_getsync(): not in sync resp=0x30 error for Arduino - All
Installing an Arduino Bootloader - learn.sparkfun.com

Google SpreadSheet Address to Latitude / Longitude

function getLatLong(adress) {
  try{
    if(adress=="")return("");
    var geo = Maps.newGeocoder().geocode(adress);
    if(geo.status=="OK"){
      var lng = geo.results[0].geometry.viewport.southwest.lng;
      var lat = geo.results[0].geometry.viewport.southwest.lat;
      return([lat,lng]);
    }  
    else{
      return("error");
    }  
  }
  catch(err){
    return(err);
  }
}

    A | B | C
1  Taipei | =TRANSPOSE(getLatLong(A1)) | 2
3

References :

How to get Latitude and Longitude for Addresses?

strtok warning

warning: initialization makes pointer from integer without a cast

#include <string.h>

References :
Error: Assignment makes pointer from Integer without a cast... in C Prog - Stack Overflow