SX1262MB2xAS can't reach +22 dBm

[estelle.beneito]

Hello,
I’m using sx1262 with stm32 board and stm32 Ide.

This is my configuration :

And this is the init of my communication :

setPacketType(0x01);
setRfFrequency(915000000); //or 868000000 because I’m in Europe
setPaConfig(0x04, 0x07, 0x00, 0x01); //PaDuty, hpMax, Device, paLut
setTxParams(0x16, 0x00); //0x16 = 22 dBm
setBufferBaseAddress(0x00, 0x00);
setModulationParams(sf, bw, cr, ldro);
setDioIrqParams(IRQ_RADIO_ALL, IRQ_TX_DONE, 0, 0);

I use attenuators to respect the radio transmission laws in Europe and a spectrum analyser to see the transmitted power. However, even adding the loss in my attenuators I never reach +22 dBm I stay stuck at around +10 dBm…

Do you have a solution to help me please?
Thanks

[mantoine]

Hi @estelle.beneito!

On this PCB, there is a RF switch between the chip and the antenna connector.

It should be solved if you add a call the following call SetDIO2AsRfSwitchCtrl(0x01). You also have to drive high the pin D8 (ANT_SW in the schematic).

[estelle.beneito]

Hi @mantoine !

Thanks a lot it works now !!