How to switch between bluetooth and wifi in esp32 - http

Question

I am doing an autonomous car project, I need manual control as well as an autonomous function, so the manual control is done through wif using "gesture control" and for the autonomous control I want to send the location data via Bluetooth, I will be choosing between both, using a toggle switch connected to ground and one of the pins. I went through the inbuilt wifi Bluetooth switch program but I have no idea how to modify it. I am still okay if I can send data through the HTTP request but, then I have to connect it to a network right? But again I don't have any idea, how to write the code to switch between the two networks.I am using an ESP32 devkit
This is the inbuilt example code for Bluetooth switch
#include "WiFi.h"
#define STA_SSID "your-ssid"
#define STA_PASS "your-pass"
#define AP_SSID "esp32"
enum { STEP_BTON, STEP_BTOFF, STEP_STA, STEP_AP, STEP_AP_STA, STEP_OFF, STEP_BT_STA, STEP_END };
void onButton(){
static uint32_t step = STEP_BTON;
switch(step){
case STEP_BTON://BT Only
Serial.println("** Starting BT");
btStart();
break;
case STEP_BTOFF://All Off
Serial.println("** Stopping BT");
btStop();
break;
case STEP_STA://STA Only
Serial.println("** Starting STA");
WiFi.begin(STA_SSID, STA_PASS);
break;
case STEP_AP://AP Only
Serial.println("** Stopping STA");
WiFi.mode(WIFI_AP);
Serial.println("** Starting AP");
WiFi.softAP(AP_SSID);
break;
case STEP_AP_STA://AP+STA
Serial.println("** Starting STA");
WiFi.begin(STA_SSID, STA_PASS);
break;
case STEP_OFF://All Off
Serial.println("** Stopping WiFi");
WiFi.mode(WIFI_OFF);
break;
case STEP_BT_STA://BT+STA
Serial.println("** Starting STA+BT");
WiFi.begin(STA_SSID, STA_PASS);
btStart();
break;
case STEP_END://All Off
Serial.println("** Stopping WiFi+BT");
WiFi.mode(WIFI_OFF);
btStop();
break;
default:
break;
}
if(step == STEP_END){
step = STEP_BTON;
} else {
step++;
}
//little debounce
delay(100);
}
void WiFiEvent(WiFiEvent_t event){
switch(event) {
case SYSTEM_EVENT_AP_START:
Serial.println("AP Started");
WiFi.softAPsetHostname(AP_SSID);
break;
case SYSTEM_EVENT_AP_STOP:
Serial.println("AP Stopped");
break;
case SYSTEM_EVENT_STA_START:
Serial.println("STA Started");
WiFi.setHostname(AP_SSID);
break;
case SYSTEM_EVENT_STA_CONNECTED:
Serial.println("STA Connected");
WiFi.enableIpV6();
break;
case SYSTEM_EVENT_AP_STA_GOT_IP6:
Serial.print("STA IPv6: ");
Serial.println(WiFi.localIPv6());
break;
case SYSTEM_EVENT_STA_GOT_IP:
Serial.print("STA IPv4: ");
Serial.println(WiFi.localIP());
break;
case SYSTEM_EVENT_STA_DISCONNECTED:
Serial.println("STA Disconnected");
break;
case SYSTEM_EVENT_STA_STOP:
Serial.println("STA Stopped");
break;
default:
break;
}
}
void setup() {
Serial.begin(115200);
pinMode(0, INPUT_PULLUP);
WiFi.onEvent(WiFiEvent);
Serial.print("ESP32 SDK: ");
Serial.println(ESP.getSdkVersion());
Serial.println("Press the button to select the next mode");
}
void loop() {
static uint8_t lastPinState = 1;
uint8_t pinState = digitalRead(0);
if(!pinState && lastPinState){
onButton();
}
lastPinState = pinState;
}
Below is part of the main code i use, i want to modify it so i can either switch between bluetooth and esp now or between espnow and http
*/
#include <esp_now.h>
#include <WiFi.h>
#include <esp_wifi.h>
#include <TinyGPS++.h> // Tiny GPS Plus Library
#define CHANNEL 4
uint8_t mac[] = {0x36, 0x33, 0x33, 0x33, 0x33, 0x33};
struct __attribute__((packed)) DataStruct {
//char text[32];
int x;
int y;
unsigned long time;
};
DataStruct myData;
//*****************************************************************************************************
// GPS Locations
unsigned long Distance_To_Home; // variable for storing the distance to destination
int ac =0; // GPS array counter
int wpCount = 0; // GPS waypoint counter
double Home_LATarray[50]; // variable for storing the destination Latitude - Only Programmed for 5 waypoint
double Home_LONarray[50]; // variable for storing the destination Longitude - up to 50 waypoints
int increment = 0;
#define autopilot 13
void gesturecontroll();
void getGPS();
void getCompass();
void setWaypoint();
void move();
int blueToothVal;
void setup()
{ Serial.begin(9600); // Serial 0 is for communication with the computer
S2.begin(9600); // Serial 2 is for GPS communication at 9600 baud - DO NOT MODIFY - Ublox Neo 6m
Serial.println("ESPNow/Basic/Slave Example");
//Set device in AP mode to begin with
WiFi.mode(WIFI_AP);
// configure device AP mode
// This is the mac address of the Slave in AP Mode
esp_wifi_set_mac(ESP_IF_WIFI_STA, &mac[0]);
Serial.print("AP MAC: "); Serial.println(WiFi.softAPmacAddress());
// Init ESPNow with a fallback logic
if (esp_now_init()!=0) {
Serial.println("*** ESP_Now init failed");
while(true) {};
}
// Once ESPNow is successfully Init, we will register for recv CB to
// get recv packer info.
esp_now_register_recv_cb(OnDataRecv);
Serial.print("Aheloiioi");
// Extras////////////////////////////////////////////////////////////////////////////////////
pinMode(autopilot, INPUT);
}
void OnDataRecv(const uint8_t *mac_addr, const uint8_t *data, int data_len) {
memcpy(&myData, data, sizeof(myData));
char macStr[18];
snprintf(macStr, sizeof(macStr), "%02x:%02x:%02x:%02x:%02x:%02x",
mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
Serial.print("Last Packet Recv from: "); Serial.println(macStr);
Serial.print("Last Packet Recv Data: ");
Serial.println(myData.x);
Serial.println(myData.y);
Serial.println("");
Serial.println();
//move();
Serial.println();
}
//********************************************************************************************************
// Main Loop
void loop()
{ if (autopilot == HIGH)
{
move(); // going for manual control
}
else
{
getGPS(); // Update the GPS location
getCompass(); // Update the CompaSerial Heading
Ping(); // Use at your own discretion, this is not fully tested
}
}
I could have tried if all these initial setups came under an "if statement" in the void loop, but these initial setups come in the void setup,so i have no idea on how to proced

Answer 1

I think this example need hardware also like toggle switch between GPIO 0 & ground on top of the code these comments are there.
//Sketch shows how to switch between Wi-Fi and Bluetooth or use both
// Button is attached between GPIO 0 and GND and modes are switched with each press
this example code as wifi.h library included but "BluetoothSerial.h" library is not included I don't it works properly in real time without this "BluetoothSerial.h" library
About terminology in ESP32 Wi-Fi go through it:- https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_wifi.html
I think first prepare hardware as given in example then start coding.