Can you post your code please?
Ioannis
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Re: Serin Serout possible wiring distance
I have built a circuit, where PIC16F870 and 16F628A talk to each other via serial port, 9600 bps. Using Cat. 5E ethernet cable, it works fine at 20 meter distance. It may work on longer one too, just I had no need, so haven't tested.
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Re: Serin Serout possible wiring distance
Thanks for info CuriousOne.
Ioannis,
I'll post both codes. At the moment I'm also on the Ciseco forum trying to get to bottom of this. Seems to be sending packets but I'm not getting them. It stops in control code at "Signal Strength" on LCD so it appears that there is no info received in order to carry on in code.
CONTROL Code (Master)
Code:;####################################################### ; # ; 868.3 MHz RF Link - Control Unit # ; # ; Rob Lane 22-4-2013 # ; # ;####################################################### ' ' ;***************************************************************************** ; ; Target Controller - PIC16F628A ; __________ ; RF MODULE PIN 2--RA2 |1 18| RA1--- R SELECT ; RF MODULE PIN 3--RA3 |2 17| RA0--- E BIT ; --RA4 |3 16| OSC1-- ; +5V--via 4.7k-!MCLR |4 15| OSC2-- ; Ground----Vss |5 14| VDD--- +5 V ; sig strength on--RB0 |6 13| RB7--- data 0 ; SWITCH --RB1 |7 12| RB6--- data 9 ; GREEN LED --RB2 |8 11| RB5--- data 8 ; RED LED --RB3 |9 10| RB4--- data 7 ; ---------- ; ; **************************************************************************** ; * Configuration fuse information: ; **************************************************************************** @ __config _HS_OSC & _WDT_OFF & _MCLRE_OFF & _BODEN_OFF & _LVP_OFF & _CP_OFF ' INCLUDE "modedefs.bas" DEFINE OSC 10 TRISA=%00000000 TRISB=%11110000 CMCON=7 ; comparators off redled VAR PortB.3 greenled VAR PortB.2 jump VAR PortB.0 ; signal strength switch switch VAR PortB.1 redstop VAR BYTE greengo VAR BYTE rfon var byte flip VAR BYTE sigfield var word sigcontrol var word DEFINE DEBUG_REG PORTA ; Set Debug pin port DEFINE DEBUG_BIT 3 ; Set Debug pin bit DEFINE DEBUG_BAUD 9600 ; Set Debug baud rate DEFINE DEBUG_MODE 0 ; Set Debug mode: 0 = true, 1 = inverted DEFINE DEBUGIN_REG PORTA ; Set Debugin pin port DEFINE DEBUGIN_BIT 2 ; Set Debugin pin bit DEFINE DEBUGIN_MODE 0 ; Set Debugin mode: 0 = true, 1 = inverted ' LCD Display ' ----------- ' Adjust these to suit your chosen LCD pinout ' Define LCD_DREG PORTB ' Port for LCD Data Define LCD_DBIT 4 ' Use upper 4 bits of Port Define LCD_RSREG PORTA ' Port for RegisterSelect (RS) bit Define LCD_RSBIT 1 ' Port Pin for RS bit Define LCD_EREG PORTA ' Port for Enable (E) bit Define LCD_EBIT 0 ' Port Pin for E bit Define LCB_BITS 4 ' Using 4-bit bus Define LCD_LINES 2 ' Using 2 line Display Define LCD_COMMANDUS 1200 ' Command Delay (uS) PAUSE 500 LCDOut $FE,1 ' Clear LCD PAUSE 10 LCDOUT $FE,$80," Rob Lane " LCDOUT $FE,$C0," 2013 " PAUSE 2000 redstop = 1 greengo = 2 rfon = 3 LCDOUT $FE,1 pause 10 LCDOUT $FE,$80, "Waiting" IF SWITCH = 1 THEN FLIP = 0 ; check staus of switch at power up IF switch = 0 then flip = 1 ; counter setup flipflop for single command send main: if jump = 0 then rssion IF switch = 1 AND flip = 0 THEN GOSUB red PAUSE 50 IF switch = 0 AND flip = 1 THEN GOSUB green GOTO main red: PAUSE 1 DEBUG "BOB",redstop if jump = 0 then rssion ; check if signal strength display needed DEBUGIN 500,red,[WAIT("ACK")] LOW greenled ; turn off green led HIGH redled ; turn on red led LCDOUT $FE,1 ; clear lcd Pause 10 LCDOUT $FE,$80," Light is RED " flip = 1 ; flip flop counter to ensure send only once RETURN green: PAUSE 1 DEBUG "BOB",greengo if jump = 0 then rssion DEBUGIN 500,green,[WAIT("ACK")] LOW redled HIGH greenled LCDOUT $FE,1 PAUSE 10 LCDOUT $FE,$C0," Light is GREEN " flip = 0 RETURN rssion: LCDOUT $FE,1 Pause 10 LCDOUT $FE,$80," Test Mode " pause 1500 ; ############### TEST MODE ON ##################### ison: debug "BOB",rfon if jump = 1 then rssioff debugin 1000,ison,[WAIT("ACK")] PAUSE 1100 ; wait 1 second debug "+++" debugin 1500,ison,[WAIT("OK")] PAUSE 1100 ; wait 1 second LCDOUT $FE,$80, "Pass +++" pause 1500 debug "ATNT3",13,10 debugin 1500,ison,[WAIT("OK")] LCDOUT $FE,$80, "Pass ATNT3" pause 1500 DEBUG "ATDN",13,10 debugin 1500,main,[WAIT("OK")] LCDOUT $FE,$80, "Pass ATDN" pause 1500 LCDOUT $FE,$80, "Signal Strength" Pause 10 sigstrength: if jump = 1 then rssioff ; check input to reset to serial debugin 1000,sigstrength,[WAIT("aSSRSSIS-",sigfield)] ; get slave signal strength value debugin 1000,sigstrength,[WAIT("aMMRSSIM-",sigcontrol)] ; get control signal strength value LCDOUT $FE,$80," Light Unit ",sigfield LCDOUT $FE,$C0," Control Unit ",sigcontrol goto sigstrength rssioff: LCDOUT $FE,1 Pause 10 PAUSE 1100 ; wait 1 second debug "+++" debugin 1500,rssioff,[WAIT("OK")] PAUSE 1100 ; wait 1 second debug "ATNT0",13,10 debugin 1500,rssioff,[WAIT("OK")] debug "ATDN",13,10 debugin 1500,main,[WAIT("OK")] LCDOUT $FE,1 pause 10 goto main END
FIELD Code (Slave)
Code:;####################################################### ; # ; 868.3 MHz RF Link - Field Unit # ; # ; Rob Lane 22-4-2013 # ; # ;####################################################### ' ' ;***************************************************************************** ; ; Target Controller - PIC16F628A ; __________ ; RF MODULE PIN 2--RA2 |1 18| RA1--------- RELAY ; RF MODULE PIN 3--RA3 |2 17| RA0--------- ; -RA4 |3 16| OSC1-------- ; +5V-----------!MCLR |4 15| OSC2-------- ; Ground----------Vss |5 14| VDD---------+5 V ; -----------RB0 |6 13| RB7--------- ; -----------RB1 |7 12| RB6--------- ; ---RB2 |8 11| RB5--------- ; --RB3 |9 10| RB4--------- ; ---------- ; ; **************************************************************************** ; * Configuration fuse information: ; **************************************************************************** @ __config _HS_OSC & _WDT_OFF & _MCLRE_OFF & _BODEN_OFF & _LVP_OFF & _CP_OFF ' INCLUDE "modedefs.bas" DEFINE OSC 10 TRISA=%00000100 CMCON=7 relay VAR PortA.1 signal VAR BYTE DEFINE DEBUG_REG PORTA ; Set Debug pin port DEFINE DEBUG_BIT 3 ; Set Debug pin bit DEFINE DEBUG_BAUD 9600 ; Set Debug baud rate DEFINE DEBUG_MODE 0 ; Set Debug mode: 0 = true, 1 = inverted DEFINE DEBUGIN_REG PORTA ; Set Debugin pin port DEFINE DEBUGIN_BIT 2 ; Set Debugin pin bit DEFINE DEBUGIN_MODE 0 ; Set Debugin mode: 0 = true, 1 = inverted LOW relay ' Program main: debugin [WAIT("BOB"),signal] IF signal = 1 THEN GOSUB redstop ENDIF IF signal = 2 THEN GOSUB greengo ENDIF IF signal = 3 THEN GOSUB rssion ENDIF GOTO main redstop: HIGH relay PAUSE 1000 debug "ACK" RETURN greengo: LOW relay PAUSE 1000 debug "ACK" RETURN rssion: debug "ACK" pause 10 debug "ACK" pause 10 debug "ACK" PAUSE 1100 debug "+++" debugin 1500,rssion,[WAIT("OK")] PAUSE 1100 high relay ;relay has led for ON pause 500 debug "ATNT4",13,10 debugin 1500,rssion,[WAIT("OK")] low relay pause 500 debug "ATDN",13,10 debugin 1500,rssion,[WAIT("OK")] high relay pause 15000 ; waiting time in test mode before return to normal goto rssioff rssioff: PAUSE 1100 ; wait 1 second debug "+++" debugin 1500,rssioff,[WAIT("OK")] PAUSE 1100 ; wait 1 second debug "ATNT0",13,10 debugin 1500,rssioff,[WAIT("OK")] debug "ATDN",13,10 debugin 1500,rssioff,[WAIT("OK")] goto main END
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Re: Serin Serout possible wiring distance
Ioannis and all,
Please forget these modules. The rudeness I received on the Ciseco forum from the manufacturers means I'm abandoning them.
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Re: Serin Serout possible wiring distance
Without a Datasheet is difficult to make something good.
There are many modules that can do the job. Do you have a target price and freq range?
Ioannis
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Re: Serin Serout possible wiring distance
Hi Ioannis,
Unfortunately I'm stuck with these modules as the 'client' bought them.
I have his base requirements working 100% but I let myself in for more work when I mentioned signal strength output.
Trouble is the modules do not have any visual indication as to what they are doing. I'm working blind, other than turning leds on/off on my board at strategic points in the software.
I get confirmation after each AT command that the slave is in test mode.
It will not respond to anything else when in test mode other than "+++" guard characters for command mode, so I put in a time loop to turn test mode off later by software.
The master sits and waits after confirming it is in test mode. Then nothing. Both should be transmitting at 1 second intervals with RSSI information in db fed on the serial port from the master. They loopback the RSSI.
I do not have an interface to connect to my PC to test, besides that is no use anyway as the modules will be standalone. Testing on a PC just proves they work that way.
I also considered another set of rf modules originally from another manufacturer. They had red and green status leds on board. Red when TX, green when RX. Both on for config mode. Much more useful.
I chose the Ciseco modules because of power output and the support forum.
At first on the forum I thought they were a bit defensive and odd. Now they insult my admittedly limited intelligence and are downright rude.
I don't believe they read the replies carefully. I had to repeat what I had tested, even though the answer to what I had done was two posts up.
I've spent tens of hours on this. I'm leaving them just doing the basic function the 'client' wanted. On/off red/green light.
'Client' is a misnomer, I'm doing them for free.
Rob
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Re: Serin Serout possible wiring distance
THIS IS FROM THEIR SETUP RSSI INFO PAGE
The AT commands are in the brakets at the side. Compare to my code.
In order to test the range between two devices, it is possible to put two XRF's into a special mode via either the AT commands or the XCM. Once in the special mode it will send a packet once a second from an XRF connected to your PC (master) to another 'remote' (slave) XRF. The slave XRF will measure the incoming RSSI level and send the packet straight back. The master XRF then measures the RSSI of this and displays both packets serially.
The image below shows the continuous output you will see on your screen. We're interested in the first two values:
aSSRSSIS-045 (the signal strength of 045) received at the slave and
aMMRSSIM (046) received at the master (your PC).
HOW TO SETUP
During setup we advise turning off any other XRFs, so that only the two you are using to test range are turned on. If this is impossible then change the two devices to be tested to another PANID.
First set up the slave (remote end).
1. Configure on your PC using XCM or AT commands
2. Change ATNT (node type) to 4 (ATNT4)
3. Write to permanent memory (ATWR)
4. Close the session (ATDN)
Unplug the first XRF and plug in the second XRF
Configure the master (PC end)
1. Configure on your PC using XCM or AT commands
2. Change ATNT (node type) to 3 (ATNT3)
3. Write to permanent memory (ATWR)
4. Close the session (ATDN)
5. Leave the second XRF on your PC and in a serial monitor window as above
Test Power up the first XRF with 2 to 3.6v, at a distance over 1 meter away. Two AA batteries are perfect for this, but make sure your voltage is not greater than 3.6v
You will see the two RSSI levels being written to the screen once a second.
MAXIMUM RANGE When the RSSI figures reach 88 to 92 you've reached the maximum distance you can achieve reliably. If you are planning to run at distances close to this then we advise conducting the test a few times during the day to make sure you are getting a reliable connection.
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