LoPy

Objective

Our aim is to test the lora signal for LoPy micro-controller with different bandwidths. We performed both for line-of-sight test and the test with obstacles (buildings and trees). The tests are the outdoor test with good weather condition. The test with bad weather condition will be our future work.

Testing Scenarios

Two LoPy micro-controllers are used. One sends a signal and other waits for a signal before replying back. The random sleep is used to avoid jamming at nodes, which can cause the packet lost. For all the test, one node is stationary node while another moves with the human-walking speed.

Line-of-sight experiment

medium range: bandwidth=LoRa.BW_250KHZ,coding_rate=LoRa.CODING_4_5,sf=7 fast short range: bandwidth=LoRa.BW_500KHZ,coding_rate=LoRa.CODING_4_5,sf=7 slow long range: bandwidth=LoRa.BW_125KHZ,coding_rate=LoRa.CODING_4_8,sf=9 very slow long range: bandwidth=LoRa.BW_125KHZ,coding_rate=LoRa.CODING_4_8,sf=12

Building and trees experiment

medium range: bandwidth=LoRa.BW_250KHZ,coding_rate=LoRa.CODING_4_5,sf=7 fast short range: bandwidth=LoRa.BW_500KHZ,coding_rate=LoRa.CODING_4_5,sf=7 slow long range: bandwidth=LoRa.BW_125KHZ,coding_rate=LoRa.CODING_4_8,sf=9 very slow long range: bandwidth=LoRa.BW_125KHZ,coding_rate=LoRa.CODING_4_8,sf=12