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Sorry... it seems be more important : programming with the Code editor don't work now...
I re-install the drivers and the firmware... I can connect the espruino pico but I have always the error "prompt..." when I send to the espruino.
Could you help me ?
Thank you and best regards

Hi,
I try the Graphical designer (blocks) for a workshop with kids... unfortunately I cannot program the Espruino pico directely with the Graphical designer. I have always an error : "Prompt not detected..." (see printscreen above).
Could you help me ?
Thank you and best regards
Gerald

Hi Gordon,

Have you some news from ST about this problem of consumption ?

Best regards

OK... rather good news if you get the same thing as me :)
Thank you to see with ST... because, for an embedded system, it's a little bit annoying to have to connect the USB and reprogram before using the battery !!!

300uA is in the values I mesured... there are many variations for this "strange mode"

So... wait and see :)

Thanks and best regards

Hi Gordon,
Sorry, I have checked my setup and all is OK with GND. I observe the following points :
1) I save the code, set deep sleep, disconnect USB and the consumption is about 30uA : OK
2) I disconnect the battery and reconnect it : the consumption increases to 600uA
3) I reconnect USB and connect the board (with IDE) and set deep sleep : always 600uA
4) The only way to obtain 30uA is to restart with point 1

I have done these 4 points with and without B6 and B7 to GND. The best result is without.
I also tested with B6 and B7 „digitalRead“ or not… the problem is the same.

The firmware is 1v85.227 (I hope the link above is OK) and the code is :

digitalRead([B0,B15,B14,B13,B10,B1,A7,A6,A5,A4,A3,A2,A1,A0,A10,B9,B8,A8,B7,B6,B5,B4,B3]);
setInterval(function() {
  digitalWrite(LED1, 1);
  setTimeout(function () {
    digitalWrite(LED1, 0);
  }, 20);
}, 10000);
setDeepSleep(1);

Thank you for your help !

Thank you Gordon, now I have a consumption of about 20uA even if I disconnect the USB. But... if I disconnect the battery and I reconnect it the consumption increases to about 550uA. It's better but not enough for my purpose. Could you do something ?

Thank you Gordon... but, sorry, I have another problem now : when I download (with Chrome) the firmware with your link above, it is impossible to reconnect the pico (LED red ON)... The only way to restart it is to download the old 1.85... Have you an idea ?

Hi Gordon,

Have you some news about this problem of consumption ?

Best regards

Yes, the Pico still works with 700uA. It seems that an IO is in an undefined state (the state is momentary fixed with the USB and undefined at start with the battery).

OK... if I connect all the pins and the battery, I plug the USB, I download the code and I unplug the USB, I mesure a consumption of about 10 to 20 uA. The problem now is if I disconnect and reconnect the battery, the consumption rises up to 700uA ! Could you try my first test ? You program the board via USB, you disconnect it, you connect the board on the breadboard and to the battery. In these conditions you should get about 700uA... If so, have you an idea to maintain the consumption at 20uA even if the battery is disconnected and reconnected ?

Very strange... I tested with your code, pulling down all the inputs as mentioned above (but not B6/B7 and with a 47uF)... and the consumption is about 700uA (measured with an A-meter).

I tried with another board : always the same consumption of about 1mA. But if I put all the pins as "output" the consumption is about 500uA... rather higher than your value... Have you an idea ?
The setup :

• Pico : 1.4
  
• Firmware : from Chrome IDE or from Github 1.85 (no difference)
  
• Vcc = 3.7V (GND and VBat)
  
• 4 - 5mV on a 10Ohms resistor (400 to 500 uA)
  
• 100nF Low ESR on wires to the board
  
  
  

Thank you for your answer !

I use the pins Bat and GND as mentionned... More precisely, I tested with GND and VBAT and another test with GND and BAT_IN. Maybe the board is OUT... I'll try with another one.

Yes, I saved the code with save(). The code is :

setInterval(function() {
  digitalWrite(LED1, 1);
  setTimeout(function () {
    digitalWrite(LED1, 0);
  }, 20);
}, 10000);
setDeepSleep(1); 

Hi Gordon and thank you for your answer. When I download the firmware with the "standard mode" of Chrome IDE, I notice a consumption of about 1mA. When I download the 1v85 from the link http://www.espruino.com/binaries/espruino_1v85_pico_1r3_wiznet.bin I have a consumption of 12mA. My board "Pico" is all naked and just connected on a LiPo. Have you an idea ?

Hi everybody...
Sorry but I can't find the firmware 1v81 as mentioned above. The power consumption of my Pico is about 2mA @3.7V. Have you an idea ?
Thank you for your answer