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Low Power RF & Wireless Connectivity
How to Read to RI-RFM-007B-30 ???
i have RI-RFM-007B-30 reader, How can read id for pic18F4550 , i was read datas but dont understand, anybody can be halp me read id?
please clarify your intent - it seems you want to use the PIC MCU to communicate with the RFM instead of using the CTL module - is this correct? If so - then i would direct you to these documents ==>
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Yes, i want PIC MCU to communicate with the RFM,
ok - then the links in the last post should help you out in writing your firmware.
:( i cant read any code, when i tag to antenn face to face only receive "00000000000" dissipated and the "0110010101010110"
finaly... :S false.
have any example code?
??? No coment?
please let us know what tag type you are trying to read/write.
Have you furthermore checked:
- Q factor of connected antenna
- Power supply is linear and not switched mode
- Power supply delivers up to 2A
- Checked whether all other requirements are fulfilled as defined in the datasheet
Yes, maybe not plugged in.????
Texas does not want to help. impossible to understand you. Why do not you have a any sample code??? :S
i will dont ask for help again.
The firm will buy another product.
Ty . BB
read operation is successful. write code with Proton iDE.
Want to help ? please contact with me. firstname.lastname@example.org
Video file ...for How to reading.
Dear I am herewith sending the details about system which we are using production. My Auto-Id system performance not stable, can you please provide me support for analyze problem and solution.
1. Reader (RI-RFM-007B)
2.Antenna (own designed) · Antenna, double coil/loop balanced antenna Inductance– 28.24uH
3. Tag:- · RI-TRP-WR2B-30
my system performance not stable so we required support for investigation and solution to improve rfid system performance.
Some Time Reader detect transponder from 1m distance and some time only detect when distance between tag and reader approximate 1 cm
if you could reference the manuals on this module, you will see the antenna coil should be 26 to 27.9uH (27uH is value i always have gone for, you are listing 28.24uH, which is outside that range) and be a sufficient Q value (this is high Q system, so 200-300 is common # to go for)
this would be first thing to check and repair - (these are simple and robust systems until you deviate from recommendations :)
then - there is a document describing how to check the integrity of your system located here which should also be very helpful to you ==> http://www.ti.com/litv/pdf/scba021
you may also have noise in the field (like CRT monitors, just for a older common example, can degrade the system if they are near because the flyback transformers inside them operate @ 75kHz, so the second harmonic is close enough to the fundamental carrier (134.2kHz) and big enough signal to compete with it.
you can also use that RFM passively, with a battery, to sniff out a noise source too. See attached how to wire that up - i even put LEDs in there to get a sense of the level - it is a point source locator for LF and sensitive enough to divine exactly where it is coming from.
and what i called a "screamer"...this will help you tune it if the antenna is remoted - it gets louder and centers on about 1kHz or so when you hit resonance. (it changes pitch if you are off)
Thanks for answer. other question when i check antenna resonance voltage (in Antenna connector end) approx 150Vpeak its OK or not or its can be region for low field strength.
seems pretty low - but it depends on what DC voltage the supply is, too.
@ 12VDC you will most likely see ~250Vp, @ 24VDC you will most likely see >350Vp
as always i really encourage the use of the documentation.
This is the user guide, which is critical for you to be using ==> http://www.ti.com/litv/pdf/scbu022
Dear my power supply 12v 500ma liner its good or not
good point - most likely then you are current limited...@ 12VDC you should be pulling 1Apeak...also in the user manual...so my advice on that is to use a power supply rated for at least double that (this is the general rule of thumb on current rating of power supply for any electronics) - so you need to get a P/S rated for 2Apeak.
can you please help for antenna design i thing my antenna design not correct. so field strength not good.
my RFID system performance not stable some time reader detect tag (transponder) from one meter distance and some not detect if distance less then 5cm. Please brief me how to find problem
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