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External WiFi Antenna Mod for Sonoff 4CH Pro R3: Feasibility and Steps

kaie 543 1
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  • #1 21360043
    kaie
    Level 1  
    Hello,
    Is it possible to attach an external antenna to a Sonoff 4CH Pro R3? Is it possible to scratch the antenna blank and get the mass from GND? Sonoff 4CH Pro R3 PCB with four relays and electronic components on a green background. Sonoff 4CH Pro R3 circuit board with marked elements. Sonoff 4CH Pro R3 circuit board with visible electronic components and markings.
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  • #2 21421963
    rustynail1
    Level 4  
    I've done it on a router with a strip antenna and no antenna connector, the real problem is the impedance so the new antenna and connection cable could not match, so results could be worse. My router is now connected to a double biquad antenna.
    But, to do it, you should desolder the last capacitor before the original antenna to disconnect it, and there connect your cable (and of course the ground as needed).
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