217 lines
7.8 KiB
C++
217 lines
7.8 KiB
C++
// Basic Config
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#include "globals.h"
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// LMIC-Arduino LoRaWAN Stack
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#include "loraconf.h"
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#include <lmic.h>
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#include <hal/hal.h>
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#ifdef MCP_24AA02E64_I2C_ADDRESS
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#include <Wire.h> // Needed for 24AA02E64, does not hurt anything if included and not used
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#endif
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// Local logging Tag
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static const char *TAG = "lorawan";
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// functions defined in rcommand.cpp
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void rcommand(int cmd, int arg);
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void switch_lora(int sf, int tx);
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// DevEUI generator using devices's MAC address
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void gen_lora_deveui(uint8_t *pdeveui) {
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uint8_t *p = pdeveui, dmac[6];
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int i = 0;
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esp_efuse_mac_get_default(dmac);
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// deveui is LSB, we reverse it so TTN DEVEUI display
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// will remain the same as MAC address
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// MAC is 6 bytes, devEUI 8, set first 2 ones
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// with an arbitrary value
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*p++ = 0xFF;
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*p++ = 0xFE;
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// Then next 6 bytes are mac address reversed
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for ( i=0; i<6 ; i++) {
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*p++ = dmac[5-i];
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}
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}
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// Function to do a byte swap in a byte array
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void RevBytes(unsigned char* b, size_t c)
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{
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u1_t i;
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for (i = 0; i < c / 2; i++)
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{ unsigned char t = b[i];
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b[i] = b[c - 1 - i];
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b[c - 1 - i] = t; }
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}
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void get_hard_deveui(uint8_t *pdeveui) {
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// read DEVEUI from Microchip 24AA02E64 2Kb serial eeprom if present
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#ifdef MCP_24AA02E64_I2C_ADDRESS
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uint8_t i2c_ret;
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// Init this just in case, no more to 100KHz
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Wire.begin(OLED_SDA, OLED_SCL, 100000);
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Wire.beginTransmission(MCP_24AA02E64_I2C_ADDRESS);
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Wire.write(MCP_24AA02E64_MAC_ADDRESS);
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i2c_ret = Wire.endTransmission();
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// check if device seen on i2c bus
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if (i2c_ret == 0) {
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char deveui[32]="";
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uint8_t data;
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Wire.beginTransmission(MCP_24AA02E64_I2C_ADDRESS);
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Wire.write(MCP_24AA02E64_MAC_ADDRESS);
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Wire.requestFrom(MCP_24AA02E64_I2C_ADDRESS, 8);
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while (Wire.available()) {
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data = Wire.read();
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sprintf(deveui+strlen(deveui), "%02X ", data);
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*pdeveui++ = data;
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}
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i2c_ret = Wire.endTransmission();
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ESP_LOGI(TAG, "Serial EEPROM 24AA02E64 found, read DEVEUI %s", deveui);
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} else {
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ESP_LOGI(TAG, "Serial EEPROM 24AA02E64 not found ret=%d", i2c_ret);
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}
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// Set back to 400KHz to speed up OLED
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Wire.setClock(400000);
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#endif // MCP 24AA02E64
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}
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#ifdef VERBOSE
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// Display a key
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void printKey(const char * name, const uint8_t * key, uint8_t len, bool lsb) {
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uint8_t start=lsb?len:0;
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uint8_t end = lsb?0:len;
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const uint8_t * p ;
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char keystring[len+1] = "", keybyte[3];
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for (uint8_t i=0; i<len ; i++) {
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p = lsb ? key+len-i-1 : key+i;
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sprintf(keybyte, "%02X", * p);
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strncat(keystring, keybyte, 2);
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}
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ESP_LOGI(TAG, "%s: %s", name, keystring);
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}
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// Display OTAA keys
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void printKeys(void) {
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// LMIC may not have used callback to fill
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// all EUI buffer so we do it here to a temp
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// buffer to be able to display them
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uint8_t buf[32];
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os_getDevEui((u1_t*) buf);
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printKey("DevEUI", buf, 8, true);
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os_getArtEui((u1_t*) buf);
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printKey("AppEUI", buf, 8, true);
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os_getDevKey((u1_t*) buf);
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printKey("AppKey", buf, 16, false);
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}
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#endif // VERBOSE
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void do_send(osjob_t* j){
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uint8_t mydata[4];
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// Sum of unique WIFI MACs seen
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mydata[0] = (macs_wifi & 0xff00) >> 8;
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mydata[1] = macs_wifi & 0xff;
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#ifdef BLECOUNTER
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// Sum of unique BLE MACs seen
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mydata[2] = (macs_ble & 0xff00) >> 8;
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mydata[3] = macs_ble & 0xff;
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#else
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mydata[2] = 0;
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mydata[3] = 0;
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#endif
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// Check if there is not a current TX/RX job running
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if (LMIC.opmode & OP_TXRXPEND) {
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ESP_LOGI(TAG, "OP_TXRXPEND, not sending");
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sprintf(display_lmic, "LORA BUSY");
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} else {
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// Prepare upstream data transmission at the next possible time.
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LMIC_setTxData2(1, mydata, sizeof(mydata), (cfg.countermode & 0x02));
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ESP_LOGI(TAG, "Packet queued");
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sprintf(display_lmic, "PACKET QUEUED");
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// clear counter if not in cumulative counter mode
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if (cfg.countermode != 1) {
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reset_counters(); // clear macs container and reset all counters
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reset_salt(); // get new salt for salting hashes
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}
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}
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// Schedule next transmission
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os_setTimedCallback(&sendjob, os_getTime()+sec2osticks(SEND_SECS * 2), do_send);
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} // do_send()
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void onEvent (ev_t ev) {
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char buff[24]="";
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switch(ev) {
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case EV_SCAN_TIMEOUT: strcpy_P(buff, PSTR("SCAN TIMEOUT")); break;
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case EV_BEACON_FOUND: strcpy_P(buff, PSTR("BEACON FOUND")); break;
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case EV_BEACON_MISSED: strcpy_P(buff, PSTR("BEACON MISSED")); break;
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case EV_BEACON_TRACKED: strcpy_P(buff, PSTR("BEACON TRACKED")); break;
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case EV_JOINING: strcpy_P(buff, PSTR("JOINING")); break;
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case EV_LOST_TSYNC: strcpy_P(buff, PSTR("LOST TSYNC")); break;
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case EV_RESET: strcpy_P(buff, PSTR("RESET")); break;
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case EV_RXCOMPLETE: strcpy_P(buff, PSTR("RX COMPLETE")); break;
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case EV_LINK_DEAD: strcpy_P(buff, PSTR("LINK DEAD")); break;
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case EV_LINK_ALIVE: strcpy_P(buff, PSTR("LINK ALIVE")); break;
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case EV_RFU1: strcpy_P(buff, PSTR("RFUI")); break;
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case EV_JOIN_FAILED: strcpy_P(buff, PSTR("JOIN FAILED")); break;
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case EV_REJOIN_FAILED: strcpy_P(buff, PSTR("REJOIN FAILED")); break;
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case EV_JOINED:
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joinstate=true;
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strcpy_P(buff, PSTR("JOINED"));
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// Disable link check validation (automatically enabled
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// during join, but not supported by TTN at this time).
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LMIC_setLinkCheckMode(0);
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// set data rate adaptation
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LMIC_setAdrMode(cfg.adrmode);
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// Set data rate and transmit power (note: txpower seems to be ignored by the library)
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switch_lora(cfg.lorasf,cfg.txpower);
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// show effective LoRa parameters after join
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ESP_LOGI(TAG, "ADR=%d, SF=%d, TXPOWER=%d", cfg.adrmode, cfg.lorasf, cfg.txpower);
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break;
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case EV_TXCOMPLETE:
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strcpy_P(buff, (LMIC.txrxFlags & TXRX_ACK) ? PSTR("RECEIVED ACK") : PSTR("TX COMPLETE"));
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sprintf(display_lora, ""); // erase previous LoRa message from display
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if (LMIC.dataLen) {
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ESP_LOGI(TAG, "Received %d bytes of payload, RSSI %d SNR %d", LMIC.dataLen, LMIC.rssi, (signed char)LMIC.snr / 4);
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// LMIC.snr = SNR twos compliment [dB] * 4
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// LMIC.rssi = RSSI [dBm] (-196...+63)
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sprintf(display_lora, "RSSI %d SNR %d", LMIC.rssi, (signed char)LMIC.snr / 4 );
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// check if payload received on command port, then call remote command interpreter
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if ( (LMIC.txrxFlags & TXRX_PORT) && (LMIC.frame[LMIC.dataBeg-1] == RCMDPORT ) ) {
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// caution: buffering LMIC values here because rcommand() can modify LMIC.frame
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unsigned char* buffer = new unsigned char[MAX_LEN_FRAME];
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memcpy(buffer, LMIC.frame, MAX_LEN_FRAME); //Copy data from cfg to char*
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int i, k = LMIC.dataBeg, l = LMIC.dataBeg+LMIC.dataLen-2;
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for (i=k; i<=l; i+=2)
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rcommand(buffer[i], buffer[i+1]);
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delete[] buffer; //free memory
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}
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}
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break;
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default: sprintf_P(buff, PSTR("UNKNOWN EVENT %d"), ev); break;
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}
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// Log & Display if asked
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if (*buff) {
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ESP_LOGI(TAG, "EV_%s", buff);
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sprintf(display_lmic, buff);
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}
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} // onEvent()
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