Back in 1999, I had just gotten my hands on a nifty device called a "Palm Pilot". At the time these were quite novel, extremely expensive, and I absolutely fell in love with my palm and all the third party application available for it.
As I was also doing some industrial automation work at the time, and using Modicon PLC's, I decided to put my hand to writing a Modbus Master application for my palm, to allow the thing to query Modbus registers and such.
Using the GCC tool chain and some sample C code found on the internet I put together a palm application an announced it on the Automation Mailing List. I was received with little adieu
Following is an excerpt from the original web site I threw together:
The current beta supports single and continuous scan of up to 16 0xxxx points, 16 1xxxx points, 8 3xxxx input registers or 8 4xxxx holding registers (one type at a time). Registers can be displayed in decimal, hex or binary.
There is also a network scan that (if accessing a PLC with bridge mode on) will scan the attached MB+ segments using addresses 1-247.
The connection to the serial modbus port is using the standard Hotsync cradle or cable. The only requirement is a M-M DB9 gender changer. The hot sync cable is the preferred options. Depending on interest, custom cables may be available in the future (prices currently not set).
To become a beta tester for MB-Com, Please email: firstname.lastname@example.org
If interested, please provide the Hot Sync name of the pilot(s) intended for use so that the unlock key can be provided along with the .prc (as the program will not run at all without the unlock key).
Remember this is a Beta version, and even though it has proven stable in our labs, your milage may vary. FFAAT software nor myself will be liable for any nasty things happening to either your handheld or devices you attach to.
And when a person emailed me with their HotSync Name I would manually generate the key and mail it, along with the .prc file and a note.