Principal crítica positiva para Placa de desenvolvimento, display OLED em Banggood Brazil|Fazer compras Brasil

2pcs LILYGO® TTGO LORA32 868 MHz ESP32 LoRa OLED 0,96 polegadas Blue Display bluetooth WIFI ESP-32 Módulo de placa de desenvolvimento com Antena

23% OFF 2pcs LILYGO® TTGO LORA32 868 MHz ESP32 LoRa OLED 0,96 polegadas Blue Display bluetooth WIFI ESP-32 Módulo de placa de desenvolvimento com Antena US$45.99 US$59.99 View It

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BG224853812 03/04/2021

Good work with Arduino IDE, good quality, and item condition is OK. Antenna is small, but good, also works at a 20-25 meters distance.

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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.
Resposta 08/04/2021

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