5

Yes, when using LTE-M's eDRX mode, the TCP connection is still open, but there are some complications depending on which carrier you are using. First of all, sending data from the server to the mobile device will never wake up the mobile device instantly. The mobile device will wake up at the next eDRX interval (although some other non-cellular event could ...


3

I measured an IKEA TRADFRI control outlet (on/off) E1705 with a true-RMS multimeter. These are the results: - Relay OFF: 0.43 W - Relay ON (no load): 1.9 W


2

Inside the Sonoff, there will be an AC to DC converter like Hi-link HLK-PM03 220V to 3.3V Step-Down Buck Isolated Power Supply Module which is used to power the Wi-Fi module separately. As I have created the same Wi-Fi smart switch using a solid-state relay, ESP-12 generic module and simple LED within an AC-outlet and also created just like sonoff. If the ...


2

Despite this question is pretty old, it still lacks one very important thing: If it is legal to use in the specific country. Since EU regulations are more lax than FCC, most MCUs are not legally allowed to be used in e.g. US/Canada and similar countries, without the design being certified by FCC. Design choices such as antenna gain, filter attenuation, max ...


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