Pico with WiFi shim problems

[espruino-discuss]

Posted at 2019-04-25 by Bennr

Hi, I got one of the original Picos with wifi shim and have updated the firmware on the Pico to 2v01 using TI CC3000 Wi-Fi networking (I did try with the other one as well just to make sure). I checked the ESP firmware on the board and that is as follows "AT version:0.25.0.0(Jun 12 2015 20:26:28)\r\nSDK version:1.1.2\r\ncompile time:Jun 17 2015 22:11:51\r\n\r\nOK\r\n" I think it's the most stable version?

When I do a simple GET request, it times out and throws an error, which varies from code -6, not found to code -15, no response

I can access the endpoints through the browser/curl so I think that's ok. Am I missing something obvious? It's been a while since I did anything with my Pico and wifi so may have missed an update somewhere.

[espruino-discuss]

Posted at 2019-04-25 by @gfwilliams

Well, it all sounds reasonably positive - you've obviously got two-way comms with the ESP8266 so we can pretty much rule hardware out.

Please could you post your code up and I'll take a look? All I can think is maybe even if you're connected to a WiFi access point the DHCP may not have worked for some reason so there's no way to actually connect to the net.

You could also try doing the GET with a simple IP address and see if that helps?

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Posted at 2019-04-25 by Bennr

Yes I think it's something stupid I'm doing. It connects to the WiFi but just won't get anything.

I tried substituting the URL for 172.217.169.14 which I think is the ip for google.com but got the same result.

Thanks,

Here's my code:

digitalWrite(B9,1); // enable on Pico Shim V2
Serial2.setup(115200, { rx: A3, tx : A2 });

const http = require("http");

var wifi = require("ESP8266WiFi_0v25").connect(Serial2, function(err) {
  if (err) throw err;
  console.log("Connecting to WiFi");
  wifi.connect(WIFI_NAME, WIFI_PASS, function(err) {

    if (err) throw err;
    console.log("Connected");

    fetchData();

  });
});

function fetchData() {
  console.log('Fetching data');
  http.get("http://gomako.co.uk/hello.txt", function(res) {
  var contents = "";
    res.on("data", function(data) { contents += data; });
    res.on("close", function() { console.log(contents); });
  }).on("error", function(e) {
    console.log("ERROR", e);
  });
}

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Posted at 2019-04-25 by @gfwilliams

I just tried it here and it works fine for me on a 2v01 Pico:

Connecting to WiFi
Connected
Fetching data
Hello
>wifi.getIP(print)
=undefined
null 192.168.1.74
>wifi.getVersion(print)
=undefined
null AT version:0.25.0.0(Jun 12 2015 20:26:28)
> 

So it may well be something to do with your WiFi setup. What does wifi.getIP(print) return for you?

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Posted at 2019-04-25 by Bennr

Thanks, I had a sinking feeling it's something to do with my Wifi.

I had a look on my router and it's seeing the Espruino and assigning it an IP address.

Output is:

["AT+CIFSR\r\n"
=undefined
] "+CIFSR:STAIP,\"192"
] ".168.1.5\"\r\n+CIFSR:STAMAC,\"18:fe:34:9d:5"
] "2:14\"\r\n\r\nOK\r\n"
null 192.168.1.5

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Posted at 2019-04-25 by Bennr

Ugh, guess what? Turning my router on and off seems to have fixed the issue.

What I'm trying to do is to get an URL a few times a day. If my Wifi needs to be reset along the way, will I need to tell the Pico to reset its connection too? So if I try and fail to get a response, will I need to reset the connection is what I mean.

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Posted at 2019-04-25 by @gfwilliams

I'm not 100% sure on that, the ESP8266 itself may auto-reconnect if the AP goes down - however there is a disconnected event on wifi that you can hook onto in order to manually trigger a reconnect I believe.

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Posted at 2019-04-26 by Bennr

Ok thanks