RF Transmitter/Reciver

[mackrackit]

I just buy them to play and try to learn something so i don´t have any nature of data to transmit.

COOL! Whats next?

[Fredrick]

COOL! Whats next?

I don´t know but now i will try to get this to work better.

[Luciano]

Hi,

From page 3:
http://www.parallax.com/Portals/0/Do...ceive-v1.0.pdf


Calibration
When initiating communication between the RF modules, a sync pulse should be sent
to re-establish the radio connection between the modules. Sending several characters
can accomplish this, however sending a pulse (which maintains a high state during the
synchronization) is more efficient.

See page 6 for the BS2 code samples.


* * *

RSSI PIN (Received Signal Strength Indicator)

This line will supply an analog voltage that is proportional
to the strength of the received signal.


Can you test that and post the results?

(Do not connect the PIC microcontrollers during this test).


Step 1: Connect a digital voltmeter to the RSSI PIN of the receiver.
(Make sure the multimeter is set to DC volt and that you measure from the RSSI PIN to GND).
Power on the receiver and make sure the transmitter is powered off.
Q1: What voltage do you get on the RSSI PIN of the receiver?


Step 2: Power on the transmitter.
Q2: What voltage do you get on the RSSI PIN of the receiver?
(The transmitter and the Receiver are powered on).

Step 3: Connect +5V via a 1k ohm series resistor to the DATA pin of the transmitter.
(The transmitter and the receiver are powered on).
Q3: What voltage do you get on the RSSI PIN of the receiver?

Step 4: Connect GND via a 1k ohm series resistor to the DATA pin of the transmitter.
(The transmitter and the receiver are powered on).
Q4: What voltage do you get on the RSSI PIN of the receiver?

Best regards,

Luciano

* * *
EDIT:

These are the RF modules used by Parallax:

LR Series RF Transmitter Module Data Guide
http://www.linxtechnologies.com/Docu...Data_Guide.pdf

LR Series RF Receiver Module Data Guide
http://www.linxtechnologies.com/Docu...Data_Guide.pdf