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Loving your work @Charles. What are the units for HDOP? 171m seems excessive. You might need to leave it turned on for up to an hour so the device can download a complete almanac from the satellites.
from the tinyGPSplus webpage:

Serial.println(gps.hdop.value()); // Horizontal Dim. of Precision (100ths-i32)
so 172 would be a confidence of 1.72 which is very good for inside. It's hit 81 and 10 satellites inside:

10 81 -37.992798 175.196503 786 10/12/2016 06:12:03 899 27.60 313.37 0.57 NNE 18473 347.82 NNW 13413 4514 1

 

not bad for a 7usd unit. The 2G modem on the otherhand looks a little on the rough side - although not tested yet

 

edit for auto-correct madness

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Had some more time to play with this unit/modules:

El cheapo 2G modem - looked to boot but couldnt get any response from AT commands - looks like the unit is well used or been in around the block, very scruffy lookin

sim800 - still nit here yet

GPS and wifi:

- will pull about 130mA - 180mA getting a fix and transmitting data

- about 70mA for the GPS while wifi/mcu is in deepsleep

- about 7 or 8mA for the mcu in deepsleep - could be better

- everything asleep ~11mA

- 2100mA battery lasted about 13h running with no sleep

- shock sensor and then polling each hour when activated should give a life of about 200h

 

GPS location (DeepSleep => Wake & Get Fix => DeepSleep, hence the jitter)

hfQQDmfjJRsUmWsxMv-TywB-MYUXncAWtL_RLugdRQlv1_QpkDAcsdt6WolJgTV89-8XSNAvVQg2ovI8IWwW1sLDo6NEgobDcJS1RpPoDaf-I-f7TRVAyA2Mk3sWiB-OkKUFCK7XKP2cBxapLaTaFcZmvTzwmMlG42ef_RLnMhf0Y4WKiFrQBA-iFytgrEh8M4evPHyWZux72EifdncITdeMe3uWZEzoVu8_iYr71DO87wFCsRunI7svrDJOs8dUxM2fQ_CFzdE0NnNLbnZVbyl3YCFUNRgAYEXObVsH6B9Fqg6dTjTp-jUHjspVCfzZLwNUExtB3uXteCspSNNHTw-iH5oBKH7esD-bvKeB7vK3hTdj3p95Nd3L76zh3XrVXdy4zmDFHbX36wR_jF0Fqegtun6Gzx-CSQfdRVDut-oK3qsAICt7WOPkzOTYIoauoe0jkZpa0ZDhSeaa3A-c0GmUzRw_zfFK8uwy9Q3CfqqMf6s7xhVb6TL_CCVJW65-vOLmXw_gA2Z6yzK2Jc_Ah6s3xGpQT0_Rpxyof5qKy0ojjqFurKG0Sbi_mfjQYc_6r6g1Uwe-RjCgeUWLdmUP9RwIVBa3r0uik7xCJ1xYKvozN4ze=w1321-h534-no

130mA getting fix:

3OYxJs2IOUp0dgG7LT8VytNqzUvzz1HWTSGQ4QrXJ81f9Cb_9WqbTWeZzME3ZnF3vmS09Vqnez0jjNdzge2MbkjnJJI5Q8e2OT4wj8X4_aNgzqqrLvySiAtWJJK2kmopgPLVP0VOJZrPlZx8qsEZFZoleZAiHkMqotRrVqkP0KHTk2XoGfyLGUVG-iiUkNoG-MS88Powivl53BWAVSLhoLGsF-cGFUt9tdpOTtUIWTD_aS5U3y_ctKBVIKhlbQmdLCJ_KjnttrEFSZn18OuUI9YSxFrosR1dJpEbavBR_RCj8fjSTRFrHFAgye3CAKM6VoVjKPg34ANzlV3qjc76kTZDKMBSwst_R6zRTcJxlO25o7CQR6tRKjVdhN7Ov4dBHadcRjbL_zurSuA-8wkePTUlvUtbrGyCpbAO9IhSoWR3ZDxTW4qJb-3Lk4EA6luJPFcF8A7NBBsOLqgg7ScTHhBfbuvjt0nj7zu1du2ewfOnfiFdMusFn9RL9ytiAJPmKufito2dzQZnm6f59TMrhTunSW7LWLaAPdWAaFshc7PrjkhcTPVFhubnShPOH_pLoa1x08XNmz4kZ4xAJB7F4JfcldemyJMsNz5pcRe-X8lCdfaB=w818-h613-no

11mA asleep:

UNH1KVxWfCG59JnqEHhVLX8qg7HcY5_tO8A_z95YEfDphxiJUikHRURH6H7mUsAzPRKa2K6yNfIN5ERAhhL8-0iotr9IfKIlRUcI0mkVE_ywFAt47UpVCaS1cmyV4utrD-H4_J2xqQaIJQ8Iw8ffR526Fj48gomf__Qzt-eZaI8OBQxpKidnfJmJ5LRyjzV0B7Mn4TIaSLPxniJv-4c7FC-JuhskxCzKfUxqGKpDMsBYPqQi4OqQhBWU9nrgq22fhYyBnTUOP67HQMaumjrPA8OIIEvKaDaI1wqNbw-SGeuq7-PRqXW404LyBohBskNTtErxd82s1JJNScvzbF8aInYNIh0t-iJBDUITM0dDSn1JPf9lTTWezAyhN6CNnU_z-eGDFUpfuD6SDMhyMeAaUX1Rc9-1zqwiK_QGj-XdSTnqo9UZ39JxrV3JfdFIUb3DYt4mynDRa7RDaYY7bqFkzzz32Np_PFEOcaq37z7wNzjlThVGDTzXdFzdyr0fbcwWGlL3s-S5T6MbEUGPOfVAcFugCi5QENjuULiHUM7_kvYzSLAs65vbCghp6rnp0HQ1_Hm9LI76nB_5-hvXO0paPC17V1EbhpCXHR3PkJ0cScBcK3CG=w883-h662-no

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