Jeti RFID Battery-logger

RFID-reader is found on Ebay, there's a lot of them, just search with "RC522", heres one: www.ebay.com/itm/New-RC522-RFID-Read-Wri...f:g:ABsAAOSwyQtVz~Bk

Theres also a unit where bigger antenna is external: www.ebay.com/itm/RC522-RFID-Read-Write-C...c:g:QIsAAOSwGYVXB1fv

About data structure and compatibility with others:

This is open source and free code, if you use one solution already you can move the Jeti RFID-readers code to suit your solution, just share the code when your done so others can benefit of it

Your right, there is a market. But when (almost) all manufacturers are making closed propietary systems there is of course several solutions. Your BID is just one of them, after reading your code I can see you are using blocks starting from 0, and so do I. If you want a rfid-system that works with both then one of your codes needs some work with moving code-blocks.

What is available and what is not, and where is again about market. I'm in Finland, I've never seen anyone using Robbes BID. There's very little Robbe-chargers here to start with so this is practically impossible for me to test since I have no test-equipment to work with.

Bumb-charging will be bigger in future, that is for sure. Now we have Jeti-compatible RFID-system, now I need to see if I can make it compatible with iCharger: www.rc-thoughts.com/icharger-touch-software/

RFID-Battery is now compatible with Robbe BID

This is very simple, Onki's Robbe BID uses datablock 2 on the RFID-tag, my RFID-Battery now uses datablock 4.

When writing RFID-tag with information needed for RFID-Battery they are written so no overwriting of Robbe BID data happens.

Go to github and get the new code for your arduino: github.com/RC-Thoughts/LUA_RFID-Battery

This is tested and works, if you have built this already you need to remove RFID-Battery sensor in your transmitter and search it again.

I got some questions on PM and since they can help others I'll answer here:

"Can I monitor dual-pack of 1 x 6S and 1 x 4S in 10S configuration?"
- In theory yes but data can be read only from one battery with one RFID-reader. If you have the RFID in you 6S the application would think it's dual-pack meaning 12S. If the RFID-tag would be in 8S battery the application would think it's 16S. In both cases the low-votage-alarm would sound since total voltage would be smaller than application is expecting.

"Usage with Robbe BID?"
- If you use Onki-setup ( here ) the usage with that setup is just like before. You still need RFID-Battery hardware and softare. The compatibility means that RFID-Battery just uses different "memory-slot" in the RFID-tag than before. (Robbe BID in Onki's solution uses block 2, RFID-Battery now uses block 4)

"I don't have the hardware, will you be selling those?"
- Parts cost around 25€ for 10 RFID-tags, two RFID-units, one for reading (put in model) and one for writing. You do only need one but life is easier with two. Soldering units together and testing is about one hour, maybe a bit more. Think about costs, if I buy one set of 2 RFID-units and 10 tags, that's ~25€, then I solder and test them for you and need something for the labor, say 25€, then let's add postage from Finland as tracked shipment, that's around 15€ to Europe and around 40€ to US. Total price to EU would be around 65€ and to US around 90€. Would you buy for that amount, honestly? From those 65/90€I have to pay tax, after that I would get 10€ for myself to EU-shipped and 4€ to US-shipped unit. That's not business, that's slavery

Made a cute programmer

What's happening at the moment:

- Building menu's for programming tag's straight from transmitter with Jetibox
- Making RFID-Battery compatible with Revo Bump
- Onki -compatibility should be tested, maybe Onki could do that?

Menu's could be done this week if I can learn it, Revo will take some weeks since I'm being sent some tags from US.

I was testing the reliability of hardware for RFID-Battery today. Turned out there's some funky business going on.

R-series receivers (R6 + R9 + RSat2 tested) was working without any issues at all. REX on the other hand, (REX3, REX6 tested) was completely another story. Most of times the receiver did not recognize the sensor at all or only some of the 4 sensors-values.

I emailed Jeti and after 5 minutes got an advice to change baud-rate from 9600 to 9700baud. I had to write new timing-line to serial-library for that and reprogram the sensor.

And it's rock-solid on any receiver

Also I corrected one issue in the original RFID-code, the way it was made had the receiver waiting extra 0.5 seconds before initialization of sensor. Looked very stupid when other sensors on main screen came on and RFID half a second later. But not anymore.

We're getting there!