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Commit 9287bf2

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WiFi scanner
1 parent 8c78e4d commit 9287bf2

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3 files changed

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3 files changed

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#include <WiFi.h>
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#include "eloquent.h"
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#include "eloquent/networking/wifi/WifiScanner.h"
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String location;
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void setup() {
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Serial.begin(115200);
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delay(2000);
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Serial.println("Instructions:");
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Serial.println("\tEnter the name of the location to start scanning");
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Serial.println("\tEnter 'stop' to stop scanning");
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}
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void loop() {
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// await user to input his current location or "stop" to abort scanning
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if (Serial.available()) {
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location = Serial.readStringUntil('\n');
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}
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// if a location is set, perform scan
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if (location != "" && location != "stop") {
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// expected line format is `$location : $access_points_as_json`
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Serial.print(location);
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Serial.print(": ");
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wifiScanner.scan();
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wifiScanner.printAsJson(Serial);
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delay(3000);
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}
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}

‎src/eloquent.h

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#ifndef ELOQUENTARDUINO_ELOQUENT_H
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#define ELOQUENTARDUINO_ELOQUENT_H
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// entry point for the Eloquent Arduino library
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#endif //ELOQUENTARDUINO_ELOQUENT_H
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#pragma once
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namespace Eloquent {
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namespace Networking {
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namespace Wifi {
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/**
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* Abstract implementation of WiFi scanner
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*/
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class WifiScanner {
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public:
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/**
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* Perform scan
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*/
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void scan() {
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i = 0;
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numNetworks = WiFi.scanNetworks();
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}
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/**
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* Reset iterator
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*/
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void reset() {
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i = 0;
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}
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/**
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* Test if we can iterate over the networks
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* @return
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*/
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bool hasNext() {
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return i < numNetworks;
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}
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/**
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* Advance iterator
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*/
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void next() {
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i += 1;
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}
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/**
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* Get SID of current network
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* @return
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*/
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String ssid() {
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if (hasNext())
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return ssidAt(i);
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return "";
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}
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/**
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* Get SSID of given network
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* @param i
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* @return
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*/
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String ssidAt(uint8_t i) {
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return WiFi.SSID(i);
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}
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/**
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* Get RSSI of current network
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* @return
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*/
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int rssi() {
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if (hasNext())
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return rssiAt(i);
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return 0;
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}
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/**
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* Get RSSI of given network
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* @param i
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* @return
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*/
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int rssiAt(uint8_t i) {
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return WiFi.RSSI(i);
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}
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/**
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* Print scan results as JSON
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* @tparam Stream
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* @param stream
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*/
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template<typename Stream>
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void printAsJson(Stream& stream) {
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stream.print('{');
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for (uint8_t i = 0; i < numNetworks; i++) {
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stream.print('"');
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stream.print(ssidAt(i));
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stream.print('"');
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stream.print(':');
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stream.print(rssiAt(i));
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if (i < numNetworks - 1)
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stream.print(',');
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}
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stream.print('}');
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stream.print('\n');
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}
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protected:
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uint8_t i = 0;
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uint8_t numNetworks;
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};
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}
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}
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}
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static Eloquent::Networking::Wifi::WifiScanner wifiScanner;

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