Hello Radio Lovers,
Just for fun I am planning to set up a communication bridge
between two Android phones using 3 of these LILYGO® TTGO Meshtastic T-Beam V1.1 ESP32 433/868/915/923Mhz WiFi BLE Lora ESP32 GPS NEO-6M SMA 18650 Battery Holder With OLED
devices.
One of them should act as a repeater on the rooftop of my house, this should work shouldn’t it ?
rooftop repeater
+-----------+
| meshtastic|
/| node2 |\
/ +--------- -+ \
/ \
/ \
+--------+ +------------+ / \ +-----------+ +--------+
| phoneA | bluetooth | meshtastic |--+ +--| meshtastic| bluetooth | phoneB |
| |-----------| node1 | | node3 |-----------| |
+--------+ +------------+ +-----------+ +--------+
Here in EU I can choose between 433Mhz and 868Mhz.
I can’t decide which one is better.
Some say 433Mhz is crowded with tire pressure sensors, temperature/humidity sensors and garage door remotes.
But if I scan with my rtl sdr 868Mhz seems to be crowded as well.
868Mhz seems to be the more popular and “modern” frequency for lora, 25mW is allowed but only a duty cycle of 1%, correct ?
433Mhz on the other hand is better to get a bit around corners (this is what i googled), or through trees and bushes, and there is no duty cycle limit, but only 10mW are allowed, right ?
868Mhz at 25mW versus 433Mhz at 10mW,
thats the question, which one works better in the woods ?
Since I already own a lot of nice 433 Mhz antennas
I tend to buy the 433 Mhz version but I am not sure if I will regret this soon.
I have got a Diamond X-30 2m/70cm antenna (144Mhz/433Mhz) mounted on a hight mast on my rooftop with 25m Aircell 7 coax cable which ends in my basement.
Is it sufficent/clever to use this for 433Mhz lora ?
Or will all 10mW be lost in the 25m coax cable ?
Or better mount the complete small lora device (which is supposed to be the repeater) including antenna on the Mast ?
Some advice is really appreciated.
Thanks in advance
Lixus