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WiFi Woes

A project log for Data Collection Terminal

General purpose low cost handheld terminal with screen/kbd, wifi, barcode and RFID reader for industrial or commercial (or any other) use

bozBoz 08/10/2014 at 21:321 Comment

PCB is back, GLCD and barcode and RFID all sweet however I think there is short under the wifi module as I cannot get a response, so I will need to try and swap the module or build another board sometime this week (groan!) - hoping its just a bad module or soldering, cant find an error on the board as when I wired in a spare module via some flying leads I got a response..

Two other little problems with the wifi module

1. The USR module refuses to go into standby low power mode at the moment, this is unfortunately a show stopper if they dont reply to me with a solution. The unit is averaging 8-10mA but when I issue the AT+MSLP=standby command to get it to sleep, the power consumption goes all over the place then back to 8-10mA within a second.

2. If the wifi is disconnected, the only way I currently can see of reconnecting is to reset it physically or via a AT+Z command, 

the manual is not very good in either of these areas but a bit more experimenting should produce results. The sleep power is a bit of a show stopper if I cannot get it working :-(

Also the original RN131 module is out of stock until the end of september (groan!) but if I dont get the other module behaving I will bite the bullet and go back to it with the enevitable delay.

Discussions

Boz wrote 08/11/2014 at 06:31 point
Reply received from USR.. Bugger!

1. AT+MSLP, this command is not supported currently. This it pointed in the manual. As for consumption, 8-10mA is really low in our operation

2. no faster way to reconnect.

I'll argue it is not pointed out very well in the manual, I'll have a think outside the box and get back..

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