The spring antenna is inexpensive and can be used for a variety of 868MHz radios, e.g. B. for the radio module
868mhz Antenna for Use in Smart Home Raspberry Pi-HM-MOD-RPI-PCB Kit Fibaro System Home Center 2 ELV Kit RaspberryMatic PiVCCU NFC RFID Module ISM Band LTE GSM Wlan Ham Radio Raspberrymatic Homematic-man
Applications: Homematic CCU3, CCU2, CCU1, CHARLY, Radio Module from ELV, RaspberryMatic Raspberry Pi CC1101 Fibaro System Home Center 2 Dimmer 2 Bypass 2 Fibaro Starter Kit Motion Flood Smoke Door / Window Sensor Home Intelligence