Want to use an AE ADAMS scale for data logging to Excel

I use my AE ADAMS PGL scale for data logging weight loss of items already, using the software that comes with the scale. But I want to add additional sensors (temp, humidity) and want to data log everything into one location, all at the same time. I would also like to be able to log straight into Excel.

First, I would like to know how to connect scale that has an RS-232 output and how to capture the data coming out of the scale with an Arduino. I do not know if the data coming out of the scale is usable or if it is encrypted. How would I test for this?

I've seen others make or hack other scales and load cells. I would like to avoid hacking the scale. I would build rather build my own scale if all else fails.

Scale I already have: AE ADAMS PGL 001001, Bi-Directional RS-232 (9-pin) to USB Cable using a Prolific Driver http://www.adamequipment.com/am/balances/179

First, I would like to know how to connect scale that has an RS-232 output and how to capture the data coming out of the scale with an Arduino.

You need an RS232 to TTL circuit. Then connect the output to the serial data pins ( 0 & 1 on a Uno) and use Serial.read to read the data.

I do not know if the data coming out of the scale is usable or if it is encrypted. How would I test for this?

Encryption is unlikely, if it makes sense that you know. Print out the raw value and see what interpretation makes sense.

Would I be better off going with a breakout broad or a shield?

https://www.sparkfun.com/products/449

https://www.sparkfun.com/products/13029

Well I would go with this one:- https://www.sparkfun.com/products/449 It is less intrusive, but I don't know why it is more expensive.

The other one is fine if you don't need to do much else with your setup and need it installed permanently.

Thanks Mike, I'm not sure why it's more. I wish it had at least one mounting hole, I might shop around for a different one.