Garbage data serial WIZ107SR

Question

Hello! Today i received the wiz107SR module and i stumbled upon a problem. When reading from the ethernet port or my com port i get weird garbage data. See the picture for the serial settings and the garbage data: drive.google.com/file/d/0B3SCvA … sp=sharing But when i connect TX and RX from the Wiz107SR and read and write from the ethernet port everything is fine, the usual message appears: LGSEG:CONNECTED and i can write “hello” and receive “hello”. I’m using a FTDI Usb to serial cable to connect my com port to the Wiz107SR. COM3 <–> FT232R <–> WIZ107SR <–> Ethernet I tried numerous things including resetting, uploading other firmware and using other terminal programs but nothing seems to work. Model name: WIZ107SR Revision: 1.4 Firmware version 4.04 PC interface: Device terminal 1.0 Thank you in advance!

eNDi · Answer

COM3 ↔ FT232R ↔ WIZ107SR ↔ Ethernet There are two kinds of WIZ107SR: with RS232 levels on RxD/TxD/RTS/CTS (WIZ107SR has a SIPEX 3232EBE chip on bottom), and with TTL levels (WIZ107SR_TTL). In first case your setup will not work (FT232R has TTL level).

SHeijnen · Answer

That explains alot! The SP3232EBE chip is indeed present on the bottom. The retailer where i bought the module listed the I/O’s as 3.3V - 5.0V so i automatically assumed it was TTL level. Thanks for the heads-up!

eNDi · Answer

This also happened to me To convert it to TTL I desoldered the SP3232EBE and closed the corresponding 4 bridges (R38, R39, R40, R41). Check the newest schematics - RxD, TxD, RTS and CTS are translated, others are TTL. TTL levels on WIZ107SR are 3.3V, inputs are 5V tolerant.

SHeijnen · Answer

Awesome! Just did what you suggested after seeing the schematics and it works like a charm now Guess they’re using the same hardware minus the SP3232EBE for the TTL version ( which makes a lot of sense ) Again cheers!