[紀錄片] COWSPIRACY 畜牧業的陰謀

影片網址：
https://www.youtube.com/watch?v=TtyRHb-WNp8

影片講述畜牧業對環境的影響，一些危害如水源污染、溫室效應等等，片尾提倡吃素救地球。

室內配線 - 網路資源分享

分享目錄
https://drive.google.com/open?id=0B2ZOsqPyz09ZMFZqY1dXZmd6NVk

Ebyte LoRa Module

Spec

Module: E32-TTL-100
Product Link: http://www.cdebyte.com/product/html/?114.html
Power: 100mW
Transmission distance: 3KM
Chip: Semtech SX1278
Band: 410-441MHz
UART: 9600 8N1(default)
Current:
  Receive: 14.5mA(mode 0/1),30uA(mode 2)
  Sleep: 2.0uA(m0m1=11)
  Transmit: 110mA(20dBm)

Mode

0: working, M0M1=00

1: wake up, M0M1=01

2: power-saving, M0M1=10

3: sleep, M0M1=11

Pinout

Schematic

AUX Pin

high

low

Command(under Mode 3)

  C1

    C1 C1 C1: get the current configuration

  C3

    C3 C3 C3: get the module version information

  C4

    C4 C4 C4: perform a reset

C0,C2

Byte Seq.	Name	Bits	Description
0	HEAD	Control command
		C0H	configuration keep after reset
		C2H	lost after reset
1	ADDH		address high byte(00H-FFH)
2	ADDL		address low byte(00H-FFH)
3	SPED	Speed
		Bit 7,6	UART mode
		00	8N1(default)
		01	8O1
		10	8E1
		11	8N1
		Bit 5,4,3	TTL baud rate(bps)
		000	1200
		001	2400
		010	4800
		011	9600(default)
		100	19200
		101	38400
		110	57600
		111	115200
		Bit 2,1,0	Air speed(bps)
		000	0.3K
		001	1.2K
		010	2.4K(default)
		011	4.8K
		100	9.6K
		101	192.2K
		110	19.2K
		111	19.2K
4	CHAN	Channel
		Bit 7,6,5	X
		Bit 4,3,2,1,0	00H-1FH(default: 17H, 433Mhz) corresponding to 410 -441Mhz
5	OPTION	Option
		Bit 7	Transmission Mode
		0	channel/address from module itself
			(transparent)
		1	channel/address from commands
			(point-to-point?)
		Bit 6	IO drive
		0	TXD, AUX: open
			RXD: open
		1	TXD, AUX: push-pull
			RXD: pull-up
		Bit 5,4,3	Wake-up time(ms)
		000	250(default)
		001	500
		010	750
		011	1000
		100	1250
		101	1500
		110	1750
		111	2000
		Bit 2	FEC(Forward error correction)
		0	off
		1	on(default)
		Bit 1,0	Power(dBm)
		00	20(default)
		01	17
		10	14
		11	10

Module Testing

1. Make sure the UART path work
1. Pull high for both M0 and M1(sleep, mode 3)
2. Connect the module to your PC with UART or USB-TTL cable
3. Configure the UART port as 9600 8N1.
4. Send "0xC3 0xC3 0xC3" to retrieve the module versions
5. You should see the module send back data like, 
2. Set up another module with above instructions, name it host and another for client
3. Client
1. Configure with C0 command set
• C0 12 34 1A 17 44
• C0: keep configuration after reset
• 12 34: address
• 1A: 
• UART mode: 8N1
• UART baud rate: 9600 bps
• Air speed: 2.4K bps
• 17: Channel 433Mhz
• 44: 
• transparent mode 
• wake-up time: 250ms
• FEC on
• power: 20dBm
2. Set to mode 0 (M0M1=00)
4. Host 
1. Configure with C0 command set, C0 12 34 1A 17 44
2. Set to mode 0 (M0M1=00)
3. Send any text
4. Check the client side, if the client receives the same text

Field Test

  My experience here 

Chip Versions

Part Number	Frequency Range	Spreading Factor	Bandwidth	Effective Bitrate	Est. Sensitivity
SX1276	137 - 1020 MHz	6-12	7.8 - 500 kHz	.018 - 37.5 kbps	-111 to -148 dBm
SX1277	137 - 1020 MHz	6-9	7.8 - 500 kHz	.011 - 37.5 kbps	-111 to -139 dBm
SX1278	137 - 525 MHz	6-12	7.8 - 500 kHz	.018 - 37.5 kbps	-111 to -148 dBm
SX1279	137 - 960 MHz	6-12	7.8 - 500 kHz	.018 - 37.5 kbps	-111 to -148 dBm