Hi Daniel
Using these modules is the same as communicating between two pics if there was a wire connecting them.
Below is the code the sending module is attached to, I have removed all unnecessary code and left all the defines etc so you can copy them exactly see if it works.
Then the code on the receiving module is:Code:'**************************************************************** '* Name : Sensirion SHT71.pbp * '* Author : Tony Flynn * '* Notice : Copyright (c) Tony Flynn * '* : All Rights Reserved * '* Date : 30/10/2008 * '* Version : 7 - Code transmits TempC, TempF, RH & Time to * '* PICS on the network and serially to the PC * '* Notes : * '**************************************************************** '------------------------- Port Assignments -------------------------------- ' PORTA.0 (02) Time flag pin from user interface, make pin input and pull to gnd (26) ' PORTA.1 (03) Serin time + all other settable parameters from User Interface (07) ' PORTA.2 (04) Serout to PID Controller (17) ' PORTA.3 (05) ' PORTA.4 (06) ' PORTA.5 (07) Serout to Ethernet - Must select HS OSC on this module & ' Ethernet PIC. Also non-inverted both sides. (38) ' PORTB.0 (21) Interrupt Pin Square wave from DS1307 (07) ' PORTB.1 (22) SHT11 SCK Clock Pin (03) ' PORTB.2 (23) SHT11 Serial Data Pin (02) ' PORTB.3 (24) RS232 Serial Out to PC (Obsolete, moved to PID) ' PORTB.4 (25) Power Failure pin (Obsolete, moved to PID) ' PORTB.5 (26) Hatch Status pin (Obsolete, moved to PID) ' PORTB.6 (27) ICSP Pin 5 ' PORTB.7 (28) ICSP Pin 4 ' PORTC.0 (11) ' PORTC.1 (12) ' PORTC.2 (13) ' PORTC.3 (14) I2C Clock Line SCL DS1307 - 4k7 Pull up resistor (06) ' PORTC.4 (15) I2C Data Line SDA DS1307 - 4k7 Pull up resistor (05) ' PORTC.5 (16) ' PORTC.6 (17) USART TX Pin to wireless transceiver (03) ' PORTC.7 (18) USART RX Pin '********************** 16F876A Configuration Fuses **************************** @ DEVICE HS_OSC ' Crystal Selected (High Speed is above 4MHz) @ DEVICE WDT_ON ' Watch Dog Timer is on - Needed for SLEEP command @ DEVICE PWRT_OFF ' Power Up Timer off, unit stays in reset for 72ms allowing Vdd to settle @ DEVICE BOD_ON ' Brown Out Detect on @ DEVICE LVP_OFF ' Low Voltage Programming off @ DEVICE CPD_OFF ' Data EEPROM code protection @ DEVICE WRT_OFF ' Write to Flash protection off @ DEVICE DEBUG_OFF ' On board Debugger off @ DEVICE PROTECT_OFF ' Protects code from being read from the chip '******************************************************************************* '--------------------------- Setup DEFINE's ---------------------------------- include "modedefs.bas" ' Contains Serout Baud rates DEFINE OSC 12 ' Using 12 MHz Oscillator DEFINE CHAR_PACING 1000 ' Pacing for serout Chars DEFINE HSER_RCSTA 90h ' enable hardware serial port DEFINE HSER_TXSTA 24h ' enable high speed transmit (Burgh=1) DEFINE HSER_BAUD 19200 ' set the baud rate for MIDI communications '------------------------ Port Initialization ------------------------------- CCP1CON = %00000000 ' Disable CCP Module ADCON1 = %10000111 ' Set analog ports to digital mode, right justified CMCON = %00000111 ' Turn off comparator OPTION_REG.6 = 0 ' Interrupt on falling edge of RB0/INT pin OPTION_REG.7 = 0 ' PORTB Pullups enabled INTCON = %10010000 ' Global and RB0 Interrupts enabled TRISA = %000001 TRISB = %00000111 TRISC = %00000000 '----------------------------------USART---------------------------------------- USART: ' Data sent to the wireless transceiver for remote module pause 5 hserout [$55,$55,$55,$55,"TC",TempC.lowbyte,tempc.highbyte,TempF.lowbyte,TempF.highbyte,RHTempComp.lowbyte,RHTempComp.highbyte] Return
Code:'**************************************************************** '* Name : Monitoring Station - Rev 1 * '* Author : Tony Flynn * '* Notice : Copyright (c) 2008 Tony Flynn * '* : All Rights Reserved * '* Date : 29/10/2008 * '* Version : Rev 3 - Components removed for low power op * '* Notes : Wireless minitoring station using 16F88 and * '* wireless module Cy2198TR. Data is displayed on * '* LCD. System operates at 4MHz. Data is beamed to * '* this module from other transceiver. Line into * '* other transceiver is non inverted USART from PIC * '* line into this PIC also non-inverted. Unit is * '* Designed to run off 3 AA Alkaline batteries. * '* * '**************************************************************** '------------------------- Port Assignments -------------------------------- ' PORTA.0 (17) LCD Data Line - Bit 4 ' PORTA.1 (18) LCD Data Line - Bit 5 ' PORTA.2 (01) LCD Data Line - Bit 6 ' PORTA.3 (02) LCD Data Line - Bit 7 ' PORTA.4 (03) LCD Data Line - Register Select - 10k pullup resistor to VDD ' PORTB.0 (06) HPWM out to dim LCD light to off after X seconds ' PORTB.1 (07) Button to turn on display for X time ' PORTB.2 (08) Seiral Data in from wireless module. Wireless module voltage ' should be no greater than 1.5V less than MCU (5V). Tx from ' transceiver links directly to Rx of PIC. ' PORTB.3 (09) LCD Data Line - Enable ' PORTB.4 (10) Wireless module Enable active low, High = low power mode. ' PORTB.5 (11) Alarm Out pin '************************ 16F88 Configuration Fuses **************************** @ DEVICE PROTECT_OFF @ DEVICE CCPMX_OFF @ DEVICE DEBUG_OFF @ DEVICE WRT_OFF @ DEVICE CPD_OFF @ DEVICE LVP_OFF @ DEVICE BOD_ON @ DEVICE MCLR_OFF @ DEVICE PWRT_ON @ DEVICE WDT_ON @ DEVICE XT_OSC @ DEVICE2 IESO_OFF @ DEVICE FCMEN_ON ' Code Protection - _CP_OFF, CP_ON ' CCP1 Pin Selection - _CCP1_RB0, _CCP1_RB3 ' In-Circuit Debugger Mode - _DEBUG_OFF, _DEBUG_ON ' Flash Program Memory Write Enable - _WRT_PROTECT_OFF, _WRT_PROTECT_256, _WRT_PROTECT_2048, _WRT_PROTECT_ALL ' Data EE Memory Code Protection - _CPD_OFF, _CPD_ON ' Low-Voltage Programming Enable - _LVP_OFF, _LVP_ON ' Brown-Out Reset - _BODEN_OFF, _BODEN_ON ' RA5/MCLR/Vpp Pin Function - _MCLR_OFF, _MCLR_ON ' Power-Up Timer - _PWRTE_OFF, _PWRTE_ON ' Watchdog Timer - _WDT_OFF, _WDT_ON ' Oscillator Selection - _EXTRC_CLKOUT, _EXTRC_IO, _INTRC_CLKOUT, _INTRC_IO, _EXTCLK, _HS_OSC, _XT_OSC, _LP_OSC ' Oscillator Switchover - _IESO_OFF, _IESO_ON ' Fail-Safe Clock Monitor - _FCMEN_OFF, _FCMEN_ON '******************************************************************************* DEFINE OSC 4 ' tell program we are using a 4mhz oscillator DEFINE HSER_RCSTA 90h ' enable hardware serial port DEFINE HSER_TXSTA 24h ' enable high speed transmit (Burgh=1) DEFINE HSER_BAUD 19200 ' set the baud rate for MIDI communications define HSER_CLROERR ' Auto clear overflow buffer error. CCP1CON = %00000000 ' Disable CCP SSPCON.5 = 0 ' Disable SSP Module ANSEL = %00000000 ' Set analog ports to digital mode CMCON = %00000111 ' Turn off comparator TRISA = %100000 ' Port A I/O Selection TRISB = %11110110 Display: low lowpower ' Disable lower power operation pause 15 ' Give module time to wake Hserin[WAIT("TC"),TempC.lowbyte,tempc.highbyte,TempF.lowbyte,tempf.highbyte,RHTempComp.lowbyte,RHTempComp.highbyte] high lowpower ' Set wireless tranceiver to low power mode
I used the Hserin command as I could set this to the required baud. At the time I was unaware that the Debug option could be used. I am still using this setup today an it hasn't caused me any trouble at all.
An initial problem I had was that the voltage on one of the modules was slightly on the low side and wasn't working. It worked fine once this was sorted. I havent used any inverters or the like. Serial data sent from the pin of one pic is fed into pin 3 (RX) of the wireless module through a 1k resistor, then on the other side pin 4 (TX) of the module is fed directly to the pic, no resistor.
Hope this helps, it took me a while to get them going first!
Tony
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