ESP8266 Community Forum

Posted: **Tue Sep 13, 2016 3:50 pm**

I'm running the latest Basic version on a NodeMCU esp. For the moment, I am simply trying to retrieve latitude and longitude from a json and print it. If I push "run", the esp disconnects seemingly at once, returning no data, with the computer trying to load forever until i power cycle the esp. If I run it in debug, the code runs through about 4 times, returning the values correctly, then the esp disconnects. Can anyone offer me any insight?

Thanks

Code: Select all

delay 1000
Do
serialflush
cls
let query="api.open-notify.org/iss-now.json"
delay 1000
let ret = wget(query)
let latitude = json(ret,"latitude")
let longitude = json(ret,"longitude" ) 

print latitude & longitude
Loop until 0

Pardon the crudeness, very new to coding.

Posted: **Wed Sep 14, 2016 3:55 am**

The first thing I did was to remove all the 'let's which are know to cause problems in some places.

Next was to put spaces around the "=" sign in line 5 - they are necessary.

The program then froze at the 'cls' statement - I don't know why.

But when that was removed, everything ran sweetly - and indefinitely (well, as long as I was prepared to sit and watch it!)

Try this version:

Code: Select all

delay 1000

Do
  serialflush
  query$ = "api.open-notify.org/iss-now.json"
  delay 1000
  ret = wget(query$)
  latitude = json(ret,"latitude")
  longitude = json(ret,"longitude" )
  print latitude & "   " &  longitude
Loop until 0

Phil

Posted: **Wed Sep 14, 2016 4:41 pm**

The cls will not work because there is no wait command.

In order for the page in the browser to reload it must have a wait command.

Try using a timer to run the code periodically.

The timer branch must terminate with a wait.

Code: Select all

timer 1000, [get.data]
wait

[get.data]
  cls
  serialflush
  query$ = "api.open-notify.org/iss-now.json"
  ret = wget(query$)
  latitude = json(ret,"latitude")
  longitude = json(ret,"longitude" )
  print latitude & "   " &  longitude
wait

Posted: **Thu Sep 15, 2016 4:00 am**

Hmmm - I tried that code, but it still 'hung' at the CLS statement and I had to reboot.

Tried putting in a WAIT after the CLS (just to see!) and the program continually looped round the two statements, showing "connected... disconnected..." each loop. However, I was able to interrupt it (in DEBUG) this time.

Still not sure why this happens...

Phil

ESP8266 Community Forum

Not sure why this code isn't working.

Not sure why this code isn't working.

Re: Not sure why this code isn't working.

Re: Not sure why this code isn't working.

Re: Not sure why this code isn't working.