Hi, im working on a project that scans the wifi networks nearby with rssi values and I need to print it after scanning. Im using an esp8266 nodemcu. I'm also using node-red and printing it via mqtt using mosquitto. My problem is that the SSID, RSSI values are printing one by one. I need my loop to get all available networks before printing it. Im thinking of placing it into an array and printing that but my programming skills are kinda limited.
#include <ESP8266WiFi.h>
#include <PubSubClient.h>
char dbm[10] = "dBm: ";
// Change the credentials below, so your ESP8266 connects to your router
const char* ssid = "Tenda_FE2038";
const char* password = "huertas032793";
// Change the variable to your Raspberry Pi IP address, so it connects to your MQTT broker
const char* mqtt_server = "192.168.1.4";
String sssid;
uint8_t encryptionType;
int32_t RSSI;
uint8_t* BSSID;
int32_t channel;
bool isHidden;
uint8_t prevRssi;
// Initializes the espClient. You should change the espClient name if you have multiple ESPs running in your home automation system
WiFiClient espClient;
PubSubClient client(espClient);
// Timers auxiliar variables
long now = millis();
long lastMeasure = 0;
// Don't change the function below. This functions connects your ESP8266 to your router
/*void setup_wifi() {
delay(10);
// We start by connecting to a WiFi network
Serial.println();
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("WiFi connected - ESP IP address: ");
Serial.println(WiFi.localIP());
}
*/
// This functions is executed when some device publishes a message to a topic that your ESP8266 is subscribed to
// Change the function below to add logic to your program, so when a device publishes a message to a topic that
// your ESP8266 is subscribed you can actually do something
void callback(String topic, byte* message, unsigned int length) {
// Serial.print("Message arrived on topic: ");
Serial.print(topic);
Serial.print(". Message: ");
String messageTemp;
for (int i = 0; i < length; i++) {
Serial.print((char)message[i]);
messageTemp += (char)message[i];
}
Serial.println();
Serial.println();
}
// This functions reconnects your ESP8266 to your MQTT broker
// Change the function below if you want to subscribe to more topics with your ESP8266
void reconnect() {
// Loop until we're reconnected
while (!client.connected()) {
Serial.print("Attempting MQTT connection...");
// Attempt to connect
if (client.connect("ESP8266Client")) {
Serial.println("connected");
// Subscribe or resubscribe to a topic
// You can subscribe to more topics (to control more LEDs in this example)
client.subscribe("rssi/test");
} else {
Serial.print("failed, rc=");
Serial.print(client.state());
Serial.println(" try again in 5 seconds");
// Wait 5 seconds before retrying
delay(5000);
}
}
}
// The setup function sets your ESP GPIOs to Outputs, starts the serial communication at a baud rate of 115200
// Sets your mqtt broker and sets the callback function
// The callback function is what receives messages and actually controls the LEDs
void setup() {
Serial.begin(115200);
Serial.print("Connecting to ");
Serial.println(ssid);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
// Print local IP address and start web server
Serial.println("");
Serial.println("WiFi connected.");
Serial.println("IP address: ");
Serial.println(WiFi.localIP());
client.setServer(mqtt_server, 1883);
client.setCallback(callback);
}
// For this project, you don't need to change anything in the loop function. Basically it ensures that you ESP is connected to your broker
void loop() {
if (!client.connected()) {
reconnect();
}
if(!client.loop())
client.connect("ESP8266Client");
byte available_networks = WiFi.scanNetworks();
int netnum = 0;
prevRssi = 0;
String networkarray[50];
// first lets find the SSID of the network you are looking for
// by iterating through all of the avaialble networks
// since in an enterprise there may be more than one BSSID for the SSID
// Lets find the stringest one
for (int network = 0; network < available_networks; network++)
{
//client.print(network + 1);
Serial.print(network + 1);
//client.print(": ");
Serial.print(": ");
//client.println(WiFi.SSID(network));
Serial.println(WiFi.SSID(network));
netnum = network;
prevRssi = (uint8_t)WiFi.RSSI(network);
int net1 = network+ 1;
// String networkarray[60] = {WiFi.SSID(network)};
Serial.print(networkarray[60]);
WiFi.getNetworkInfo(netnum, sssid, encryptionType, RSSI, BSSID, channel, isHidden);
//client.print("Signal strength: ");
Serial.print("Signal strength: ");
float bars;
long rssi = WiFi.RSSI();
String ssidstring = WiFi.SSID(network);
int ssidchar_len = ssidstring.length() + 1;
char ssidchar[ssidchar_len];
ssidstring.toCharArray(ssidchar, ssidchar_len);
if (RSSI > -40) {
bars = 1;
} else if (RSSI <= -41 & RSSI >= -51) {
bars = 1.5;
} else if (RSSI <= -52 & RSSI >= -62) {
bars = 2;
} else if (RSSI <= -63 & RSSI >= -73) {
bars = 2.5;
} else if (RSSI <= -74 & RSSI >= -84) {
bars = 3;
} else if (RSSI <= -75 & RSSI >= -85) {
bars = 3.5;
} else if (RSSI <= -86 & RSSI >= -100) {
bars = 4;
} else {
bars = 5;
}
char rssichar[20];
char netnum_buffer[20];
char combined[30];
char barschar[5];
itoa(bars, barschar, 10);
itoa(rssi, rssichar, 10);
itoa(net1, netnum_buffer, 10);
// strcat(combined, dbm);
// strcat(combined, rssichar);
client.publish("name/test",ssidchar);
client.publish("bars/test",barschar);
client.publish("rssi/test", rssichar);
// client.publish("name/test", netnum_buffer);
}
}
Here is a picture of my flow
Do I edit the program itself or can I program node-red into doing what I want? Any help will be appreciated.
