I'm using an ESP32 to collect data from an MPU6050 sensor. The ESP32 buffers 170 samples at a time and uploads them to ThingSpeak using the bulk update API. However, the data entries received on ThingSpeak are inconsistent. Here's the pattern of total entries I see on the channel after each upload: After 1st upload: 170 entries (correct) After 2nd upload: 338 entries (should be 340) After 3rd upload: 499 entries (should be 510) After 4th upload: 657 entries (should be 680) After 5th upload: 818 entries (should be 850) As you can see, the expected total should increase by 170 each time, but it's losing a few samples in each batch, and the number of missing entries increases over time. The losses are not consistent — it seems like 1 or 2 samples get dropped randomly in each interval. Some things I’ve considered: The ESP32 is collecting and sending the full buffer (verified via serial debug). Could it be a payload size limit, HTTP timeout, or formatting issue? Maybe ThingSpeak is silently dropping malformed lines from the bulk update? Has anyone else run into this with buffered uploads to ThingSpeak? Any tips for debugging the exact cause of dropped samples? Thanks for any help!
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