Search found 4 matches

by andrewtinkers
Tue Sep 17, 2019 9:48 am
Forum: ESP8266 SDK
Topic: system_adc_read_fast() and WiFi
Replies: 0
Views: 12250

system_adc_read_fast() and WiFi

I have been using system_adc_read_fast() while the WiFi module is on (although not transmitting). I don't see any issues with the results, but maybe there are other issues? The documentation says: "To use system_adc_read_fast, Wi-Fi has to be disabled." What are the expected adverse effect...
by andrewtinkers
Fri Nov 17, 2017 10:19 am
Forum: ESP8266 SDK
Topic: MODEM_SLEEP_T and system idle task
Replies: 3
Views: 2160

Re: MODEM_SLEEP_T and system idle task

Or, if it is really due to waiting for DTIM, is there a way to check, or to set a timeout? Or is this all in the sdk, and not accessible by developers?
by andrewtinkers
Fri Nov 17, 2017 1:27 am
Forum: ESP8266 SDK
Topic: MODEM_SLEEP_T and system idle task
Replies: 3
Views: 2160

Re: MODEM_SLEEP_T and system idle task

I see it go into DTIM mode later actually. I attached a oscilloscope capture. There is a steady modem on period (RX I guess?) and then later it goes into DTIM, which is characterized by 15mA base, with 60mA spikes at a regular interval. I'm trying to figure out what the long 60mA bit is. This tail i...
by andrewtinkers
Thu Nov 16, 2017 5:06 am
Forum: ESP8266 SDK
Topic: MODEM_SLEEP_T and system idle task
Replies: 3
Views: 2160

MODEM_SLEEP_T and system idle task

In the documentation, MODEM_SLEEP_T seems like a great way to keep the wifi connection alive, yet still saving power. However, I see some indeterminate behavior: Most of the time, after a http request, I see the modem turn off, and the current draw drops from ~60mA to ~15mA within a second. And then...

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