Fredy Alvarez
Published © GPL3+

Arduino Uno Tune Up

Get back in the IoT game to Arduino Uno with the Jolly Module (based on Atmega328PB/Esp8285H16), the trusty old Uno now with Wi-Fi function.

BeginnerProtip1 hour289
Arduino Uno Tune Up

Things used in this project

Hardware components

Arduino UNO
Arduino UNO
×1
Jolly Module
×1
USB-A to B Cable
USB-A to B Cable
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

Read more

Custom parts and enclosures

Jolly Module

Jolly Module

Schematics

Tech Specifications

Diagram of technical specifications of the architecture of the Jolly Module and its microcontrollers

Jolly Pinout

Jolly Module Pin description.

Code

ScanNetworks

Arduino
This is the code of the example that I have used to test the WiFi operation of Jolly Module. All credit to the Arduino Community and its creators.
/* ScanNetworks.ino
 *
 * This example shows how to scan nearby WiFi networks.
 *
 * Open the serial monitor to see the scanned networks with
 * related RSSI (signal strength) and encryption type.
 */

#include "WiFi.h"

void setup() {
  Serial.begin(115200);
  Serial.println("Checking WiFi linkage");

  /*
	  begin ESP8266 chip: these functions perform the chip reset and
	  initialization to ensure that the communication between ESP8266
	  and the main mcu starts in a known fashion.
  */
  WiFi.reset();
  WiFi.init(AP_STA_MODE);

  Serial.println("WiFi scan networks.");
  Serial.println();

  if (WiFi.status() == WL_NO_WIFI_MODULE_COMM) {
    /*
       notify the user if the previous sequence of operations to establish
       the communication between the ESP and the main mcu fail.
    */
    Serial.println("Communication with WiFi module not established.");
    while (1); // do not continue
  }
  else {
    /*
       otherwise we have a correct communication between the two chips
       and we can start scanning nearby networks
    */
    Serial.println("WiFi module linked!");
  }
}

void loop() {
  // start scanning networks
  scanNetworks();
}

void printEncryptionType(int thisType) {
  // read the encryption type and print out the name:
  switch (thisType) {
    case ENC_TYPE_WEP:
      Serial.println("WEP");
      break;
    case ENC_TYPE_TKIP:
      Serial.println("WPA");
      break;
    case ENC_TYPE_CCMP:
      Serial.println("WPA2");
      break;
    case ENC_TYPE_NONE:
      Serial.println("None");
      break;
    case ENC_TYPE_AUTO:
      Serial.println("Auto");
      break;
    case ENC_TYPE_UNKNOW:
      Serial.println("Unknown");
      break;
  }
}

void listNetworks()
{
  // scan for nearby networks:
  Serial.println("** Scan Networks **");
  int16_t numSsid = -1;


  numSsid = WiFi.scanNetworks();

  if (numSsid == 0) {
    Serial.println("Scanning Error");
    return;
  }

  // print the list of networks seen:
  Serial.print("number of available networks:");
  Serial.println(numSsid);

  // print the network number and name for each network found:
  for (int thisNet = 0; thisNet < numSsid; thisNet++) {

    char ssid[32];
    int32_t rssi;
    uint8_t enc;

    bool ret_code = WiFi.getScannedNetwork(thisNet, ssid, rssi, enc);
    if (ret_code) {
      Serial.print(thisNet + 1);
      Serial.print(") ");
      Serial.print(ssid);
      Serial.print("\tSignal: ");
      Serial.print(rssi);
      Serial.print(" dBm");
      Serial.print("\tEncryption: ");
      printEncryptionType(enc);
    }
    else
      Serial.println("Error while parsing data of network no. " + String(thisNet));
  }
}

void scanNetworks(void)
{
  // scan for existing networks:
  Serial.println("\nScanning available networks...");
  listNetworks();

  // wait 2 seconds before starting a new scan
  delay(2000);
}

Credits

Fredy Alvarez

Fredy Alvarez

3 projects • 18 followers
Digital Systems and Communications Engineer, Currently working at the UACJ (Networker). Studying the Master's Degree in Cloud Computing..
Thanks to Gianluca Martino.

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Related channels and tags
  • Internet of Things