Stephen Howells asked 7 years ago
I have opted for a 433mhz set up…I have ordered 2 LoRa modules (Ra-02’s) and after much checking I found an antenna that was labelled as 433Mhz compatible (The same shop does others that suit the higher frequencies as well)
https://www.aliexpress.com/item/433MHz-Antenna-for-LoRa32u4-Ra-02-LoRa-Wifi-Transceiver-Module/32862888264.html?spm=a2g0s.9042311.0.0.3dc84c4dDFl8iN
But I now note its length…”10cm”
Now the course says that I need an antenna of 173,1 mm (Although perhaps the end of the antennae hides a coil?) so which is right or can I extend mine when it arrives?
Thanks in advance, Steve
Rui Santos Staff answered 7 years ago
Hi Steve,
If you want to use the 433mhz frequency and you bought those two antennas that are already prepared for the 433mhz communication, I don’t think the length matters. Those wire lengths are for DIY antennas…
Gayrat Vlasov answered 7 years ago
Hi Steve,
You don’t describe what Lora modules you use.
As I understand, you bought separate Lora modules.
You can buy ESP32 with integrated Lora modules, including antennas in Aliexpress
Rui Santos Staff answered 7 years ago
Hi Gayrat,
I specific which LoRa modules I use: https://rntlab.com/esp32-lora-sender-and-receiver/
As I show in that Unit, I use the “RFM95 LoRa Transceiver modules”: https://makeradvisor.com/tools/rfm95-lora-transceiver-module/
You are correct, you can use the ESP32 with integrated LoRa modules.
Thanks for asking,
Rui