LASS - Flood Monitoring(淹水感測)- 系統帶起步驟與過程
 
系統帶起紀錄
  • 3G SIM 卡已買。 1.2Gbytes 易付卡,需於兩個月用完,可加值
  • 水位感測器已購買 XL-MaxSonar-WR1, 已到貨
  • LinkItONE GPRSUdpNtpClient Test PASS
  • LinkItONE SPI/SD selection doesn't matter. SIM 卡的缺角處靠近 JTAG 
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Setup()
Connected to wifi
 
Starting connection to server...
setup() done
sendNTPpacket
48
packet received
2416E30000000041435453DAA64E881EA495200000000DAA64E98FD111B63DAA64E98FD119EA7
Seconds since Jan 1 1900 = 3668332184
Unix time = 1459343384
The UTC time is 13:09:44
  • 超音波感測器到貨
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連最簡單的 Analog output 都量不到,檢查
  • V,G 有給,焊接沒有短路
  • 3.3V/5V 試過,AN 都有值,
  • 5V ADC 量到最低值為 20, 距離更近量到的值都很大,5.0/1024*20*1000/9.8 =25 inch 
  • Current spec: Operates on 3.0V – 5.5V. The average (and peak) current draw for 3.3V operation is 2.1mA (50mA peak) and 5V operation is 3.4mA (100mA peak) respectively. Peak current is used during sonar pulse transmit
  • USB 規範的電壓為5V 最大電流為500mA
  • 用 Arduino 給電測試,AN 有電壓變異,但是不太跟距離有管連