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--- nyan:lora_dev_boards [2024/03/30 00:20] – river
+++ nyan:lora_dev_boards [2025/04/30 19:32] (current) – river
@@ Line 85: / Line 85: @@
 ''espefuse.py  --port /dev/ttyUSB0 burn_efuse STRAP_JTAG_SEL''
+Read fuses:
+''espefuse.py summary''
 === Other ===
@@ Line 198: / Line 202: @@
 | 7 | MOSI |
+==== I2C ====
+RP2040 has two I2C peripherals. In Arduino they are called Wire for i2c0 and Wire1 for i2c1.
+I am using I2C1 on GPIOs 14 and 15, pins 19 (SDA) and 20 (SCL) on pico board.
+==== ADCs ====
+Max 3.3V.
+  * ADC0 used by LoRA shield for battery voltage.
+  * ACD1 and 2 look free.
+  * ADC3 is connected to Vsys by the pico board.
+  * ADC5 is temp sensor.
+  * ADC1 GPIO27 Pico Pin 32
+  * ADC2 GPIO28 Pico Pin 34
+==== Power ====
+  * Vbus is connected directly to USB socket.
+  * Vsys is after a diode from USB, input to regulator.
+  * 3V3 (out) is after regulator. Regulator not enabled if Vsys not high.
+  * 3V3 En is regulator enable, connected to Vsys by 100kR.
+=== Measured ===
+New, blank Pico W, 3.3V to 3V3 pin.
+  * Pico on its own: 9.57mA
+  * with CAN 9.62mA (might need 5V to do anything)
+  * with LoRa 12.7mA
+Flashed with Nyan, not setup:
+  * 64.8mA
+Configured with wifi:
+  * 66.34mA mostly
+  * 0.88A bursts (wifi?). Av ~70mA in these periods.
+  * From 5V: about 55mA not transmitting, 105mA LoRa TX, I think.
+  * Programmed pico board only, nothing else connected, on 3V3: ~38mA, but with some bigger bursts initially.