Jespers Lesezeichen
Latest bookmarks (page 12 of 15)
2 May
mastodon.fediverse.observer
"Mastodon Sites Status. Find a Mastodon server to sign up for, find one close to you!"
2 May
uigradients.com
"uiGradients is a handpicked collection of beautiful color gradients for designers and developers."
2 May
hackaday.io
"<h1>Range Testing </h1>
<figure><img class="lazy" data-src="https://cdn.hackaday.io/images/9158341511216798682.jpg"><figcaption>Transmitter at my desk</figcaption></figure> <h2>Testing the TTGO Modules</h2> <p>I spent a couple of hours this morning gathering some data from my two TTGO ESP32-LoRa radios to try to determine the best settings to use to get reliable communications in weak signal conditions. For the purposes of these tests I needed a relatively poor signal path so I wouldn't have to walk too far to run out of signal. To this end I placed the module programmed as the transmitter on my desk right next to my computer. My desk is located in a cubicle on the second floor of a brick building so it is surrounded on 3 sides by the (mostly) steel cubicle walls in addition to the usual clutter of steel and brick. The remaining side (south facing) is next to a window that looks down the longest sidewalk on campus. </p> <figure><img style="width: 326px; height: 547px;" width="326" height="547" alt="Signal Path 1" title="Signal Path 1" class="lazy" data-src="https://cdn.hackaday.io/images/7696561511216088274.png"><figcaption>1500ft path with no solid obstructions</figcaption></figure> <figure><img style="width: 304px; height: 336px;" alt="Signal Path 2" title="Signal Path 2" width="304" height="336" class="lazy" data-src="https://cdn.hackaday.io/images/9914481511216183745.png"><figcaption>Shorter path with significant obstructions</figcaption></figure> <h2>Signal Paths</h2> <p>I chose two signal paths for evaluation. The first is straight down the sidewalk outside my window 1500ft (457m)"
<figure><img class="lazy" data-src="https://cdn.hackaday.io/images/9158341511216798682.jpg"><figcaption>Transmitter at my desk</figcaption></figure> <h2>Testing the TTGO Modules</h2> <p>I spent a couple of hours this morning gathering some data from my two TTGO ESP32-LoRa radios to try to determine the best settings to use to get reliable communications in weak signal conditions. For the purposes of these tests I needed a relatively poor signal path so I wouldn't have to walk too far to run out of signal. To this end I placed the module programmed as the transmitter on my desk right next to my computer. My desk is located in a cubicle on the second floor of a brick building so it is surrounded on 3 sides by the (mostly) steel cubicle walls in addition to the usual clutter of steel and brick. The remaining side (south facing) is next to a window that looks down the longest sidewalk on campus. </p> <figure><img style="width: 326px; height: 547px;" width="326" height="547" alt="Signal Path 1" title="Signal Path 1" class="lazy" data-src="https://cdn.hackaday.io/images/7696561511216088274.png"><figcaption>1500ft path with no solid obstructions</figcaption></figure> <figure><img style="width: 304px; height: 336px;" alt="Signal Path 2" title="Signal Path 2" width="304" height="336" class="lazy" data-src="https://cdn.hackaday.io/images/9914481511216183745.png"><figcaption>Shorter path with significant obstructions</figcaption></figure> <h2>Signal Paths</h2> <p>I chose two signal paths for evaluation. The first is straight down the sidewalk outside my window 1500ft (457m)"