I am using LN96’s in my senior project and I am having trouble getting them to work. I bought three of them, and of the three, none of them give any indication that they are on at all. I am talking to them with a Freescale 9s12xe MCU, and have them connected in the following fashion:
GND GND
Vcc +5V
TXD RXD (9s12)
RXD TXD (9s12)
ATXD Unconnected
BTXD Unconnected
SLEEP GND
RESET +5V
There is NO response from the LED. The 5V->3.0V conversion on the board is working, I verifed that the board’s MCU has power and gnd. I verified with a scope that digital traffic is being sent to the board by the 9s12. The 9s12 has never received a response from the board. In addition, a spectrum analyzer did not detect any RF output. I am stumped, and this a critical part of my project. Any ideas?
i have the same problem. no light from the LED. i used RealTerm to send data to the transmitter but no response. when i turn on the 5v powersupply, realterm gets a string and displays it on my screen: " LN96_D V30 " and thats it. isent there anyone who have solved the problem?
Hi,
It looks like there was never an answer here. I purchased two LN96 915Mhz modems. I’m also getting the “LN96_DV30” message when power is applied. So I know I have the serial connections and the power correct. But no data ever makes it from one device to the other.
Reading some posts makes me believe there is an LED that lights up? Is that true? Where on the board is it. Also, has anyone found a way to make these devices communicate. I’m assuming they should both be set to the same channel.
Thanks.
Hi,
I am sorry, but we have not worked with these modules around here recently. We will try to look into this further. However, if you would like to send the units in for inspection and refund, we can arrange that for you. Please contact returns@sparkfun.com if this is something you would be interested in.
Thanks,
Timothy
I have one more thing to try. It looks like from the documentation that the reset pin needs to be driven high for the system to function. (Backwards from what I thought would be the case) I am going to try that and see how it goes. I had it connected to the ground. I’ll let you know how I make out. Thanks.
So I managed to get this device to work. I am using RS232, but it should work for TTL. I have a jumper on pin D and E to put it in RS232 / 8N1 mode.
1 - GND - Power supply GND
2 - Vcc - Power supply +5V
3 - TXD Unconnected
4 - RXD Unconnected
5 - SignalGround - Ground on RS232 connector (pin 5)
6 - ATXD - pin 2 on RS232 connector
7 - BTXD - pin 3 on RS232 connector
8 - SLEEP - Power supply GND
9 - RESET - Power supply +5V
The first thing after powering it up, you should receive a message at 9600 baud: “LN96_DV30”. After that, send a number 1 via the serial port. That is the ascii character 1. After that you should be in good shape.