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i have e device who use the CC1070 to transmit weather data to a receiver (who use CC1021): 902 to 928 mhz (the device is made for usa) xtal: 14.7-508.
I have the same device (but built for Europe) who use 868mhz, what can i do to make the device made for usa to work with the device made to Europe ? only chnage the xtal ?
The CC1170 868 MHz and 915 MHz reference designs are equal. There are no difference in terms of component values.
To make your 915 MHz design work at 868 MHz you simply change the register settings that sets the operating frequency (registers FREQ2, 1, 0). You get the register settings from SmartRF Studio.
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In reply to Sverre:
Thanks for your answer, is it possible to change the register setting with the CC1170 soldered on the circuit board ?
In reply to BrunoG BrunoG:
The CC1070 register settings are configured through the SPI interface. I assume you have an MCU on the board controlling the CC1170. You need to modify your SW and one of the sub-routines is probably an Initialize routine which writes the appropriate settings to the CC1070 registers.
Yes the device is powered by an ATMEGA128L, so i need to modify the firmware of the device ?
If you want to change RF frequency (or any other RF system parameter) you need to modify the firmware (i.e the CC1070 register settings).
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