BG381752505
BG381752505 Bangoodwill not publish a complete review in which I wrote that these 868MHz modules are factory defective because they did not pack the output filter properly. 1 capacitor is wrong ( 33pF instead of 3.3pF) and the output filter resonancy is 277MHz instead of 868MHz. The result is an output power of just 3dbm (1.8mW) and an extremely short range! By replacing the capacitor with another correct value the output power increases to 19dbm (80mW). I documented everything nicely, the scheme, pictures, measurements, but bangood doesn't publish my review.
BG381752505 Iwrite complete review in which I described that these 868MHz modules are factory defective because they did not pack the output filter properly. 1 capacitor is wrong (they put 33pF instead of 3.3pF) and the filter instead of being at 868MHz it is at 277MHz. The result is an output power of just 3dbm (1.8mW) and an extremely short range! By replacing the capacitor with another correct value the output power increases to 19dbm (80mW). I documented everything nicely, the scheme, pictures, measurements, but ...
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