This is going way back possibly the first Bluetooth device sold by Parallax.
Yesterday while attempting to upgrade my eb500 v1.0 to v2.0 build 247 I somehow bricked it. Yup I should have done this 10 years ago! The software I used was EmbeddedBlueDFU.exe installed on my win 2000 machine. Everything was working I tested the COM1 connection to the eb500 via a terminal at 9600baud and there were no errors. So I started the update process. The process seemed to be starting but when trying to communicate at 115,200baud something went wrong and the update software gracefully failed saying the new firmware could not be installed and the eb500 should be reset before use.
All that happends now is a continuous stream of RRRRRRR's through the serial port. No commands are accepted. The manual states that the eb500 can be reset by shorting Pin 8 and Pin 9 but it does not reset. Looks like I bricked it good. The company that made it: www.a7eng.com is gone.
So it's a long shot but has anyone seen this before and knows a way out? I do have another one that was at the other end of the link, they do work well in pairs.