Hi,
I am unable to connect to my IMP since yesterday. The last log I see is
2014-04-08 06:28:24 UTC+5.5: [Status] Device disconnected; 45 bytes sent, 0 received, 45 total
Now if I power of the device the device either show RED light (not blinking) or some times the RED led blinks. I used the iOS app to reprogram my WiFi password after the the LED became GREEN (not blinking) but I don’t see IMP connection on my WiFi router. The behavior is really unpredictable some times when I switch it on it show RED light and some time the RED LED blinks. How do I debug what is going wrong ?
The device status is shown offline in the IDE. I have been using it for 2 months without any issue.
Whenever we forcibly push new firmware (improms), it will go solid green for up to several minutes (then back to normal). For solid red, the main test point to probe should be the input voltage: the imp will boot at much lower voltages than the wifi will work at.
I was actually interested in a doc/link about how to trouble shoot the IMP and the April board. Which points to test on the board ? Is there a way to externally power the IMP. I do know how to use a multimeter. I just need some info on what to check on the April Board and IMP.
First check you get 3.3v between the GND and 3V3 pins on the edge of the april. No you can’t power the imp without a socket, ID chip, etc - basically, without an april.
No I bought a new breakup board but it still does not work. It looks like a problem with the IMP module. I also see 3.3V on the pin when its powered on but it does not work.
Did it ever see negative voltages or voltages above 3.3v on any of its IO pins? That can also fry an imp quite effectively (as you said it was working before)
Hi Hugo,
in my case is the IMP completely new. If the configured wifi network is off, then I can clear the IMP configuration by BlikUp. But after new configuration is the “solid red effect” back. I tried 3 wifi network, 3 cables and powers and lot of wifi configurations. (Small note: before the “solid red” notifies the wifi network connection from IMP, but only for aproximately 1 second)
Any suggestion?
I just received my IMP001 and April board, I configured the LED program to test it out and the IMP kept shutting down. After I unplugged the April board and let it sit a few mins it would start again. Then it stopped working all together. I tested the IMP by applying power directly to the SD pins. The IMP would start right up with 3.3v on its pins directly. Then I tested the April board by measuring the 3v3 pin without the IMP installed. I got .22v I was going to RMA the board but I decided to try re-flowing the solider. I set my toaster oven to 300deg and put the April board in for about 10 min till all of the solider looked shiny again. I turned off the power to the oven and let it sit a few mins to cool down. Then I tested the 3v3 pin again without the IMP installed… IT WORKED! my April board has worked since. I just ordered my second one…
@mobilecity that sounds like a dead imp (see other threads: solid red is generally either bad power or your device is unable to upgrade its OS). Return it to your supplier?
@mtaivalmaa sparkfun board (red) or one of ours (green)?