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Btw, the newest GPS modules should have quite a bit lower power consumption. Traditionally, GPS modules have had around 30mA consumption, but the newest series should go down to around 10mA in continuous mode (less in non continuous mode / using fewer satellite constellations). I think a power consumption of 30-35mA for 20 mins is a bit "expensive" for a low power buoy, but 10-15mA may be quite ok.
The GPS module I think about:
datasheet: https://cdn.sparkfun.com/assets/7/5/9/a/a/MAX-M10S_DataSheet_UBX-20035208.pdf
brief: https://content.u-blox.com/sites/default/files/MAX-M10_ProductSummary_UBX-20017987.pdf
a few more words about it: https://blog.adafruit.com/2022/10/06/eye-on-npi-u-blox-max-m10-series-gnss-modules-eyeonnpi-digikey-digikey-ublox-adafruit/
SF product: https://www.sparkfun.com/products/18037
It could be a good project for some student to look into this module in details and see how low power consumption is attainable in practice in different modes :) .
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Reproduced from the discussion at https://github.com/gauteh/sfy/issues/139 .
" Btw, the newest GPS modules should have quite a bit lower power consumption. Traditionally, GPS modules have had around 30mA consumption, but the newest series should go down to around 10mA in continuous mode (less in non continuous mode / using fewer satellite constellations). I think a power consumption of 30-35mA for 20 mins is a bit "expensive" for a low power buoy, but 10-15mA may be quite ok.
The GPS module I think about:
It could be a good project for some student to look into this module in details and see how low power consumption is attainable in practice in different modes :) . "