Jefferoonie's Tinkering Blog: 2016

So, I decided that I would expand on this past experiment:
Woods WiOn Indoor Wi-Fi Outlet Modification (Amazon Echo Too!)

***NOTE*** This is a work in progress, and who knows where it will go as it is just BSing around.

I wrote a different program, utilizing the Arduino IDE, that would allow my TI-99/4A to make a connection to this device, utilizing Stuart's Web Browser.

WiOn_TI99 ESP8266 Arduino Code:

#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>

const char* ssid = "FrogFi";
const char* password = "**********";

ESP8266WebServer server(80);

const int relay = 15;

void handleRoot() { 
  Serial.println("test");
  server.send(200, "text/html", "<99ml><p>TEST</p></99ml>");
}
void handleNotFound(){
  digitalWrite(relay, 1);
  String message = "<99ml><p>File Not Found</p></99ml>";
  message += "URI: ";
  message += server.uri();
  message += "\nMethod: ";
  message += (server.method() == HTTP_GET)?"GET":"POST";
  message += "\nArguments: ";
  message += server.args();
  message += "\n";
  for (uint8_t i=0; i<server.args(); i++){
    message += " " + server.argName(i) + ": " + server.arg(i) + "\n";
  }
  server.send(404, "text/plain", message);
  digitalWrite(relay, 0);
}

void setup(void){
  pinMode(relay, OUTPUT);
  digitalWrite(relay, 0);
  Serial.begin(115200);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, password);
  Serial.println("");

  // Wait for connection
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("");
  Serial.print("Connected to ");
  Serial.println(ssid);
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());

  if (MDNS.begin("esp8266")) {
    Serial.println("MDNS responder started");
  }

  server.on("/", handleRoot);

  server.on("/on", [](){
    server.send(200, "text/html", "<99ml><p>ON</p></99ml>");
    digitalWrite(relay, 1);
  });

  server.on("/off", [](){
    server.send(200, "text/plain", "<99ml><p>OFF</p></99ml>");
    digitalWrite(relay, 0);
  });

  server.onNotFound(handleNotFound);

  server.begin();
  Serial.println("HTTP server started");
}

void loop(void){
  server.handleClient();
}

I did run into some problems, that I am still working through. This little web-server not being kind to the older & slower TI.

I figured this out by utilizing telnet. I would telnet into port 80, on the device, and I noticed that it didn't give very much time to issue HTTP commands like: [GET / HTTP/1.1]

I have been working though the timing by messing with ESP8266WebServer.h, that is part of the esp8266/Arduino libraries.

ESP8266WebServer.h

...

#define HTTP_DOWNLOAD_UNIT_SIZE 1460
#define HTTP_UPLOAD_BUFLEN 2048
#define HTTP_MAX_DATA_WAIT 1000 //ms to wait for the client to send the request
#define HTTP_MAX_POST_WAIT 1000 //ms to wait for POST data to arrive
#define HTTP_MAX_CLOSE_WAIT 200 //ms to wait for the client to close the connection

...

HTTP_MAX_DATA_WAIT is the value that seems to give the TI some time.

I noticed the ESP8266WebServer.h out in the GitHub project has some more timing settings:

GitHub esp8266/Arduino ESP8266WebServer.h

I may want to upgrade the packages that I am using.

The good news is, I was able to turn a lamp on, from my TI-99/4A. :)

It is probably a better idea to have a modern server talk to the ESP8266 devices, and have the TI go through that. That would allow more devices, and a centralized website created for all of them. It would also eliminate having to play around with the timing on these.

Wednesday, November 30, 2016

TI-99/4A & Woods WiOn IOT Home Automation Testing

Friday, April 29, 2016

Woods WiOn Indoor Wi-Fi Outlet Modification (Amazon Echo Too!)