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BleHM10Driver.cpp
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BleHM10Driver.cpp
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#ifndef BLEHM10DRIVER_C
#define BLEHM10DRIVER_C
#include "BleHM10Driver.h"
#include "Config.h"
#include <Arduino.h>
#include <stdlib.h>
#include <StreamSend.h>
BleHM10Driver::BleHM10Driver() :
lastPacketTime(0),
packetFragmentCount(0),
isUpdating(false),
isConnected(false),
timeout(1000),
bleResetPin(0)
{
}
void BleHM10Driver::begin(HardwareSerial &bleSerial, Serial_ &serial, byte resetPin) {
lastPacketTime = millis();
BleSerial = &bleSerial;
Serial = &serial;
bleResetPin = resetPin;
BleSerial->setTimeout(200); //Wait while reding string/bytes up to 200ms, applied to all the find* and read* methods of the Stream
initialize();
}
void BleHM10Driver::initialize() {
STARTLOGFln("[BLE] Initializing:");
reset();
//Try to communicate with the standard baud rate to set our desired baud:
//Baud Rate 0---------9600 1---------19200 2---------38400 3---------57600 4---------115200 5---------4800 6---------2400 7---------1200 8---------230400
STARTLOGF("[BLE] +- Setting baud rate to: ");
STARTLOG(baud);
const long allowedBauds[] = { 9600, 19200, 38400, 57600, 115200, 4800, 2400, 1200, 230400 };
bool baudFound = false;
for(int c=0; c < 5; c++) {
if(setBaud(allowedBauds[c], "AT+BAUD3")) {
baudFound = true;
STARTLOGFln(" [OK]");
break;
}
}
if(!baudFound) {
STARTLOGFln(" [ERR] Not Found!");
//If BLE module not working, put the Pilot board in update mode. (ie: console is proxied directly to the BLE module)
updateMode();
return;
}
BleSerial->begin(57600);
#if STARTUP_LOG
BleSerial->print("AT+VERR?");
STARTLOGF("[BLE] +- Ver: ");
STARTLOG(BleSerial->readString());
STARTLOGFln(" [OK]");
#endif
executeCommand("AT+MODE0"); //0: Transmission Mode (after connection. act as a transparent serial proxy) 1: PIO collection Mode +Mode 0 2: Remote Control Mode+ Mode 0
executeCommand("AT+ROLE0"); //0: Peripheral (ie: client, while the remote is the master "Central" node) 1: Central
executeCommand("AT+FILT0"); //1: Find only HM-10 devices 0: All
executeCommand("AT+POWE0"); //Power 0 highest, 3 low, default 2 0: -23dbm 1: -6dbm 2: 0dbm [3: 6dbm?] (ps: maybe only with 2540 chipset)
//Disabled in V526: executeCommand("AT+FIOW0"); //Flow control: 0 disabled, 1 enabled, default 0 (Need RTS and CTS pin connected)
executeCommand("AT+SHOW1"); //Show name in discovery
executeCommand("AT+TYPE0"); //No PIN
//V540:
/*executeCommand("AT+COMI9"); //Minimum Link Layer connection interval 0: 7.5ms; 1: 10ms; 2: 15ms; 3: 20ms; 4: 25ms; 5: 30ms; 6: 35ms; 7: 40ms; 8: 45ms; 9: 4000ms, default: 3
executeCommand("AT+COMA9"); //Maximum Link Layer connection interval 0: 7.5ms; 1: 10ms; 2: 15ms; 3: 20ms; 4: 25ms; 5: 30ms; 6: 35ms; 7: 40ms; 8: 45ms; 9: 4000ms, default: 7
executeCommand("AT+COLA4"); //Link Layer connection slave latency 0 ~ 4; Default: 0
executeCommand("AT+COSU0"); //Link Layer connection supervision timeout 0: 100ms; 1: 1000ms; 2: 2000ms; 3: 3000ms; 4: 4000ms; 5: 5000ms; 6: 6000ms; Default: 6(6000ms);
executeCommand("AT+COUP1"); //Switch slave role update connection parameter 0, 1; Default: 1(Update on);
executeCommand("AT+GAIN1"); // 0: No RX gain 1: Open RX gain, default: 0
*/
//Disabled in V526: executeCommand("AT+GAIN0"); // 0: No RX gain 1: Open RX gain, default: 0
executeCommand("AT+IMME1"); //0: Start immediately, not used in peripheral mode, 1: Wait for AT+START
BleSerial->print("AT+START"); //Start connecting, used only with IMME1
delay(500);
STARTLOGFln("[BLE] Ready and listening [OK]");
//other:
//AT+PCTL output PINS driver power: 0:Normal power output 1:Max power output
//NEW in 538:
/*. 1. Add AT+COMI command, config Minimum Link Layer connection interval
para1 value: 0 ~ 9; Default: 3(20ms);
0: 7.5ms; 1: 10ms; 2: 15ms; 3: 20ms; 4: 25ms; 5: 30ms; 6: 35ms; 7: 40ms; 8: 45ms; 9: 4000ms
2. Add AT+COMA command, config Maximum Link Layer connection interval
para1 value: 0 ~ 9; Default: 7(40ms);
0: 7.5ms; 1: 10ms; 2: 15ms; 3: 20ms; 4: 25ms; 5: 30ms; 6: 35ms; 7: 40ms; 8: 45ms; 9: 4000ms
3. Add AT+COLA command, config Link Layer connection slave latency
para1 value: 0 ~ 4; Default: 0;
4. Add AT+COSU command, config Link Layer connection supervision timeout
para1 value: 0 ~ 6; Default: 6(6000ms);
0: 100ms; 1: 1000ms; 2: 2000ms; 3: 3000ms; 4: 4000ms; 5: 5000ms; 6: 6000ms;
5. Add AT+COUP command, switch slave role update connection parameter
para1 value 0, 1; Default: 1(Update on);
0: Update off; 1: Update on;*/
}
void BleHM10Driver::reset() {
pinMode(bleResetPin, OUTPUT);
digitalWrite(bleResetPin, LOW);
delay(120);
pinMode(bleResetPin, INPUT);
}
void BleHM10Driver::sendCommand(String command) {
#if not REDUCED_FEATURES
if(command == "AT+SBLUP") {
BleSerial->print(command);
updateMode();
}
else {
if (isConnected) {
reset();
delay(500);
}
BleSerial->print(command);
#if SHELL_ENABLED
SHELLOUTln(BleSerial->readString());
#endif
}
#endif
}
void BleHM10Driver::updateMode() {
#if not REDUCED_FEATURES
isUpdating = true;
SHELLOUTln(F("[BLE] Update mode (115200 baud set). [OK]"));
//In Update mode the module requires 115200 baud:
BleSerial->flush();
delay(50);
BleSerial->end();
delay(100);
BleSerial->begin(115200);
//And Arduino:
Serial->flush();
delay(50);
Serial->end();
delay(100);
Serial->begin(115200);
#endif
}
bool BleHM10Driver::executeCommand(char* PROGMEM command) {
STARTLOGF("[BLE] +- ");
STARTLOG(command);
BleSerial->print(command); //0: Transmission Mode (after connection. act as a transparent serial proxy) 1: PIO collection Mode +Mode 0 2: Remote Control Mode+ Mode 0
if(!BleSerial->find("OK")) {
STARTLOGFln(" Cmd not recognized! [ERR]");
return false;
}
STARTLOGFln(" [OK]");
return true;
}
//Baud Rate 0---------9600 1---------19200 2---------38400 3---------57600 4---------115200
bool BleHM10Driver::setBaud(long baud, char* newBaud) {
STARTLOGF(" - ");
STARTLOG(baud);
BleSerial->flush();
delay(50);
BleSerial->end();
delay(100);
BleSerial->begin(baud); //Start with default baud for module
delay(100);
//Change BAUD (if already set, ignore it):
BleSerial->print(newBaud);
delay(100);
if(!BleSerial->find("OK")) { return false; }
STARTLOGF("-> Found!");
BleSerial->print("AT+RESET");
//Switch to new baud:
BleSerial->flush();
delay(50);
BleSerial->end();
delay(100);
return true;
}
bool BleHM10Driver::receive(char* input, int size) {
bool found = false;
//Receive command
if (BleSerial->available() >= size / 2) { //Just check for half the bytes available, when the read occur the other will be there
byte packetResults = StreamSend::receiveObject(*BleSerial, input, size);
if (StreamSend::isPacketGood(packetResults)) {
#if SHELL_ENABLED
if(!isConnected) {
SHELLOUTFln("[BLE] Connected. [OK]");
}
#endif
isConnected = true;
#if SERIAL_DEBUG_NET
long freq = millis() - lastPacketTime;
DEBUGNET(F("[INFO] [BLE] PKT freq: "));
for(int c=0; c < freq && c < 100; c +=10) {
DEBUGNET(F("#"));
}
for(int c=100; c > freq; c -=10) {
DEBUGNET(F(" "));
}
DEBUGNET(millis() - lastPacketTime);
DEBUGNET(F("ms - byte:"));
DEBUGNET(size);
DEBUGNET(F(" frag:"));
DEBUGNET(packetFragmentCount);
DEBUGNET(F(" hex: "));
for(int c=0; c < size; c++) {
printHex(input[c]);
DEBUGNET(F(" "));
}
DEBUGNETln("");
packetFragmentCount = 0;
#endif
lastPacketTime = millis();
found = true;
}
else if (StreamSend::isPacketCorrupt(packetResults)) {
#if SERIAL_DEBUG_NET
DEBUGNET(F("[BLE] [ERR] (Corrupted PKT)"));
DEBUGNET(millis() - lastPacketTime);
DEBUGNET(F("ms - byte:"));
DEBUGNET(size);
DEBUGNET(F(" frag:"));
DEBUGNET(packetFragmentCount);
DEBUGNET(F(" hex: "));
for(int c=0; c < size; c++) {
printHex(input[c]);
DEBUGNET(F(" "));
}
DEBUGNET(F(" - "));
DEBUGNET(size);
DEBUGNETln(F(""));
#endif
}
else {
#if SERIAL_DEBUG_NET
packetFragmentCount++;
#endif
}
}
if(isConnected && lastPacketTime +timeout < millis()) {
//NB: during configuration the cars automaticly disconnect due to a timeout (since no DriveCmd packets are sent during the car setup)
SHELLOUTFln("[BLE] Timeout Disconnected. [ERR]");
isConnected = false;
}
return found;
}
void BleHM10Driver::printHex(char X) {
if (X < 16) { DEBUGNET("0"); }
DEBUGNET(X, HEX);
}
void BleHM10Driver::sendObject(void* packet, unsigned int objSize) {
#if SERIAL_DEBUG_NET
DEBUGNET(F("[INFO] [BLE] "));
byte * b = (byte *) packet;
for(int c=0; c < objSize; c++) {
printHex(b[c]);
DEBUGNET(F(" "));
}
DEBUGNETln(F(""));
#endif
StreamSend::sendObject(*this->BleSerial, packet, objSize);
}
int BleHM10Driver::getBLEName(Stream &ostream, char* ptr, unsigned int objSize) {
#if !REDUCED_FEATURES
//empty receive buffer
ostream.flush();
delay(100);
while (ostream.available() > 0)
{
char t = ostream.read();
}
ostream.print("AT+NAME?"); //Send name request to BLE
ostream.flush();
delay(200);
if(!ostream.find("OK+NAME:")) {
DEBUGln(F("[BLE] Name not found! [ERR]"));
return 0;
}
//message is ok. Read name now
if (ostream.available()){
char name[14];
int bytes = ostream.readBytes(name, 13); //12 is max length by HM-10 doc
if(bytes == 0) return 0;
name[bytes+1] = '\0'; //String terminator
memcpy(ptr, name, objSize); //Copy the bytes into the struct
return bytes+1;
}
#endif
return 0;
}
#endif