接
用開源的工具Energia 不用太多的學習，這個 code SerialDisplay 是從 File Examples LquidCrystal 修改來的。
Energia sketches are C/C++ based and compiled with the open-source compiler MSPGCC. The Energia language comes from Wiring. The Energia environment is based on Processing and includes modifications made by Wiring.
// include the library code:
#include "LiquidCrystal.h"
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(P2_0, P2_1, P2_2, P2_3, P2_4, P2_5);
unsigned int PM25 = 0;
void setup() {
lcd.begin(16, 2); // set up the LCD's number of columns and rows:
Serial.begin(9600); // opens serial port, sets data rate to 9600 bps
}
void SerialData()
{
uint8_t mData = 0;
uint8_t i = 0;
uint8_t mPkt[32] = {0};
while (Serial.available())
{
mData = Serial.read();
lcd.clear();
delay(2);
if (mData == 0x32)
{
mPkt[0] = mData;
mData = Serial.read();
if (mData == 0x3d)
{
mPkt[1] = mData;
for (i = 2; i < 30; i++) {
mPkt[i] = Serial.read();
delay(2);
}
PM25 = (uint16_t)mPkt[7] | (uint16_t)(mPkt[6] << 8);
return;
}
}
}
mData = Serial.read();
lcd.println(mData);
}
void loop() {
SerialData();
lcd.print("PM2.5=");
lcd.print(PM25);
lcd.println(" ug/m3");
delay(500);
}
有圖有真相，在沒用 Energia 之前用TI 的CCS 光是工具就浪費了很多時間。
下一步就是接上WiFi 讓手機可以連，再用手機的GPS資訊和PM 值送上 internet
