I’ve looked through the forums and I can’t seem to find any posts from people with a similar issue to me. When I connect the uhf rfid shield to my Arduino Uno, I have no issues running the reader with example sketches. When I switch the shield over to my Arduino Uno WiFi Rev 2, sometimes it will work for about 20 mins, then after one of my resets I get the"module failed to respond. Please check wiring" error. I have an external 5v 10A power supply (powers my whole project), external antenna, and I’m using the software serial option on the shield. With my project, I use the WiFi, but I’ve tried the example sketch afterwards and still get the"please check wiring" error. If anyone has any suggestions on why this is happening, please let me know. I’ve been stuck researching and troubleshooting this issue for a while now so I figured, at this point, it’s time to ask smarter people than me. Below are a couple of pictures of my project. My apologies for the graininess, but it wouldn’t let me upload full quality.
I have noticed often that when the Nano module “gets lost”, it will stay unresponsive and needs a hard reset (remove and reconnect power). Often the lack of enough power is causing the issue of getting in an unknown state, but you have a strong power supply and it looks it is directly connected to the Nano. I wonder whether the WIFI signal could have impact on the Nano. You could try to remove the board from the Uno Wifi and increase the distance by connecting with 4 loose wires ( VCC, GND, D2, D3) to the Uno.
Hey there Paul…
I’m a EE and have designed an embedded RFID prototype using thie ME6 nano board. Had to play with the Arduino supply voltage to settle on an input power voltage that would not overheat the littl e7805 regulator… 7.5v seems to do well (and keeps the 5v supply at 5v). However… the nano board still occasionally “gets lost” (as one of your other makers indicates)… and I have to go out into he the field and manually power down, wait, and power back up. This is not production grade stability…
Here are [some prototype unit shots .
Any idea what’s going on? Is there any way of sending a soft reset to the board to get it back without power cycling?
Designing an inline relay to address this would be an embarrassing hack.
I’ve already submitted a support request on this.
Any suggestions welcome…