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balloon_nodes:ah3 [2014/11/02 10:26]
jcoxon
balloon_nodes:ah3 [2020/06/27 23:02] (current)
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 {{:balloon_nodes:noise.png?600|}} {{:balloon_nodes:noise.png?600|}}
 +
 +The suspicion is that the noise is triggering the rx function within the receiver and this is locking up. If the ground stations are getting caught by local interference there is a high chance that an airborne node will be in the same situation.
 +
 +To test the situation further we went on to launch a second node (BALL1) under a 100g Totex balloon. This showed a very similar pattern of quickly going out of range and then as it passed over the DB02/DB03 network passing some packets through and then disappearing. Unfortunately there were no balloon to balloon communications.
 +
 +===== Data for AH3 =====
 +
 +^ Temperature ^ Voltage ^ RSSI 1 ^ RSSI 2^
 +|{{:balloon_nodes:temp_ah3.png|}}| {{:balloon_nodes:volt_ah3.png|}} | {{:balloon_nodes:rssi1_ah3.png|}} | {{:balloon_nodes:rssi2_ah3.png|}} |
 +
 +The graph below shows the RSSI from the DB02 node, it is possible to identify both AH3 and BALL1 passing over this node and communicating with it.
 +
 +{{:balloon_nodes:db02_rssi_ah3.png|}}
 +===== Outcomes =====
 +  * The current routing allows for seamless merging of networks, AH3 flew over DB02/DB03 and was able to downlink through it.
 +  * The range is very limited (~30km max)
 +  * The RFM69HW is struggling with local interference and getting locked up
 +
 +===== Potential Solutions =====
 +  * Move the networks frequency to avoid widespread interference
 +  * Adjust the settings to improve the performance and efficency
 +  * Internally reset the radio module to avoid it locking up.
balloon_nodes/ah3.1414923975.txt.gz ยท Last modified: 2020/06/27 23:02 (external edit)