Universal LoRa packet generator with user settings.
- TxFreq
- RxFreq
- TxPower
- TxSF
- RxSF
- TxBW
- RxBW
- TxIQ
- RxIQ
- TxCR
- RxCR
- HeaderMode TX
- HeaderMode RX
- CRC TX
- CRC RX
- preparePacket
- AutoRepeating
- sendPacket (send prepared packet)
- startTXCW (continues wave)
- setStandby
- readRxPacket (read last RxPacket)
- startRx
All multi-byte values are sent in big-endian byte order.
| 2B | 4B | n | 1B |
|---|---|---|---|
| Sync Word - 0x2DD4 | Header | payload | crc - from whole packet |
Header
| 1B | 1B | 1B | 1B |
|---|---|---|---|
| size of payload | action flag | RFU | crc Header |
Action Flags Is used only in packet with cmd from 1 to 20! In another packet this field does not care.
- 1 = only set the value
- 2 = set and get answer back
- 3 = only get value from LoRaGenerator
CRC8 implementation with polynom = x7+ x6+ x4+ x2+ x0 (0xD5) CRC is the same for header and whole packet
Payload
| 1B | NB |
|---|---|
| Command (opCode) | data |
ACK payloads: - answers from MCU to PC
| cmd meaning | opCode (1B) | data N B |
|---|---|---|
| ACK | 0xFF | 0x2963 (2 B) |
| NACK | 0xFF | 0x2964 (2 B) |
| cmd meaning | opCode 1B | data N B | note |
|---|---|---|---|
| ResetMCU | 1 | empty | no return |
| GetMCU_ID | 2 | xy | return type of MCU |
| GetCPU_ID | 3 | xy | return unique CPU ID |
Table of system info
| cmd meaning | opCode 1B | data N B | note |
|---|---|---|---|
| EraseSector | 4 | sector (1B) | 0xFF for all instead those where bootloader is, returns ACK when erased |
| WriteData | 5 | adress (4 B) + data (16 B) | when OK - returns ACK |
| TryToJumpToApp | 6 | empty | try to jump to the application |
| ReadData | 7 | address (4 B) | when OK - returns this type of packet with data (16 B) instead address |
A) Table of radio commands
| cmd meaning | opCode 1B | parameters NB | note 1B |
|---|---|---|---|
| TxFreq | 20 | Frequency (4B) | 1<frequency<5 |
| RxFreq | 21 | Frequency (4B) | 1<frequency<5 |
| TxPower | 22 | Power (1B) | |
| TxSF | 23 | Spreading factor SF5-SF12 (1B) | |
| RxSF | 24 | Spreading factor SF5-SF12 (1B) | |
| TxBW | 25 | BandWidth 7810 - 500000 Hz (4B) | |
| RxBW | 26 | BandWidth 7810 - 500000 Hz (4B) | |
| TxIQ | 27 | IQ invert true/false (1B) | |
| RxIQ | 28 | IQ invert true/false (1B) | |
| TxCR | 29 | CodeRate 4/5-4/8 (1B) | |
| RxCR | 30 | CodeRate 4/5-4/8 (1B) | |
| HeaderMode TX | 31 | Enable header mode true/false (1 B) | |
| HeaderMode RX | 32 | Enable header mode true/false (1 B) | |
| CRC TX | 33 | Crc check true/false (1 B) | |
| CRC RX | 34 | Crc check true/false (1 B) | |
| preparePacket | 35 | data[0] - nasledna velikost, data[N] (N B) |
B) Table of actions commands
| cmd meaning | opCode 1B | parameters NB | note 1B |
|---|---|---|---|
| sendPacket | 50 | empty | send prepared packet, when OK - returns ACK |
| startTXCW | 51 | empty | when OK - returns ACK |
| setStandby | 52 | empty | when OK - returns ACK |
| readRxPacket | 53 | payoad size (1B), rssi (1B), payload (NB) | when OK - returns this type of packet with data |
| startRx | 54 | singleRX true/false (1 B), payloadSize 1 - 250 (1B) (value does not care in active Header Mode) | when OK - returns ACK |
C) Table of system info
| cmd meaning | opCode | data | note |
|---|---|---|---|
| getRadioChip | 203 | empty | returns "RadioChip " in this packet |
| getMinTxPower | 204 | empty | returns int8_t (power) in this packet |
| getMaxTxPower | 205 | empty | returns int8_t (power) in this packet |
Odpovedi od LoRaGeneratoru maji stejny tvar paketu az na chybejici Byte action flags
CRC table
static unsigned char crc8tab[256] = {
0x00, 0xD5, 0x7F, 0xAA, 0xFE, 0x2B, 0x81, 0x54, 0x29, 0xFC, 0x56, 0x83, 0xD7, 0x02, 0xA8, 0x7D,
0x52, 0x87, 0x2D, 0xF8, 0xAC, 0x79, 0xD3, 0x06, 0x7B, 0xAE, 0x04, 0xD1, 0x85, 0x50, 0xFA, 0x2F,
0xA4, 0x71, 0xDB, 0x0E, 0x5A, 0x8F, 0x25, 0xF0, 0x8D, 0x58, 0xF2, 0x27, 0x73, 0xA6, 0x0C, 0xD9,
0xF6, 0x23, 0x89, 0x5C, 0x08, 0xDD, 0x77, 0xA2, 0xDF, 0x0A, 0xA0, 0x75, 0x21, 0xF4, 0x5E, 0x8B,
0x9D, 0x48, 0xE2, 0x37, 0x63, 0xB6, 0x1C, 0xC9, 0xB4, 0x61, 0xCB, 0x1E, 0x4A, 0x9F, 0x35, 0xE0,
0xCF, 0x1A, 0xB0, 0x65, 0x31, 0xE4, 0x4E, 0x9B, 0xE6, 0x33, 0x99, 0x4C, 0x18, 0xCD, 0x67, 0xB2,
0x39, 0xEC, 0x46, 0x93, 0xC7, 0x12, 0xB8, 0x6D, 0x10, 0xC5, 0x6F, 0xBA, 0xEE, 0x3B, 0x91, 0x44,
0x6B, 0xBE, 0x14, 0xC1, 0x95, 0x40, 0xEA, 0x3F, 0x42, 0x97, 0x3D, 0xE8, 0xBC, 0x69, 0xC3, 0x16,
0xEF, 0x3A, 0x90, 0x45, 0x11, 0xC4, 0x6E, 0xBB, 0xC6, 0x13, 0xB9, 0x6C, 0x38, 0xED, 0x47, 0x92,
0xBD, 0x68, 0xC2, 0x17, 0x43, 0x96, 0x3C, 0xE9, 0x94, 0x41, 0xEB, 0x3E, 0x6A, 0xBF, 0x15, 0xC0,
0x4B, 0x9E, 0x34, 0xE1, 0xB5, 0x60, 0xCA, 0x1F, 0x62, 0xB7, 0x1D, 0xC8, 0x9C, 0x49, 0xE3, 0x36,
0x19, 0xCC, 0x66, 0xB3, 0xE7, 0x32, 0x98, 0x4D, 0x30, 0xE5, 0x4F, 0x9A, 0xCE, 0x1B, 0xB1, 0x64,
0x72, 0xA7, 0x0D, 0xD8, 0x8C, 0x59, 0xF3, 0x26, 0x5B, 0x8E, 0x24, 0xF1, 0xA5, 0x70, 0xDA, 0x0F,
0x20, 0xF5, 0x5F, 0x8A, 0xDE, 0x0B, 0xA1, 0x74, 0x09, 0xDC, 0x76, 0xA3, 0xF7, 0x22, 0x88, 0x5D,
0xD6, 0x03, 0xA9, 0x7C, 0x28, 0xFD, 0x57, 0x82, 0xFF, 0x2A, 0x80, 0x55, 0x01, 0xD4, 0x7E, 0xAB,
0x84, 0x51, 0xFB, 0x2E, 0x7A, 0xAF, 0x05, 0xD0, 0xAD, 0x78, 0xD2, 0x07, 0x53, 0x86, 0x2C, 0xF9};