<![CDATA[M5StickC : how to switch 5V out off?]]>Dear all,
Is it possible in the software to switch off the 5Volt output on the external pin on the M5Stick? I need that to reset my SIM7080 module.
Thanks

]]>https://community.m5stack.com/topic/5110/m5stickc-how-to-switch-5v-out-offRSS for NodeWed, 29 Apr 2026 11:31:44 GMTWed, 08 Mar 2023 08:34:16 GMT60<![CDATA[Reply to M5StickC : how to switch 5V out off? on Tue, 18 Jun 2024 09:23:28 GMT]]>@felmue I draw schematic above from my exemplar. Obviously it's too old.
IC is SOT-23-5 and its marking corresond with MP1541 datasheet.

The root of the evil is M5STACK's absolutely lackadaisical documentation for all the products.

]]>https://community.m5stack.com/post/25591https://community.m5stack.com/post/25591Tue, 18 Jun 2024 09:23:28 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Mon, 17 Jun 2024 13:54:56 GMT]]>Hello @Kabron

I beg to differ. At least between my M5StickCPlus and M5StickC the DC/DC boost circuit and IC look suspiciously identical.

M5StickCPlusVsM5StickC_240617.png

on the left: M5StickCPlus; on the right: M5StickC

Thanks
Felix

]]>https://community.m5stack.com/post/25578https://community.m5stack.com/post/25578Mon, 17 Jun 2024 13:54:56 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Mon, 17 Jun 2024 11:46:32 GMT]]>Definitelly, M5SticC and M5SticC Plus have different schematics. DC-Boost in M5SticC Plus is sgm6603-5.

]]>https://community.m5stack.com/post/25577https://community.m5stack.com/post/25577Mon, 17 Jun 2024 11:46:32 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Mon, 17 Jun 2024 09:21:50 GMT]]>Hello @Kabron

I start to think that maybe the DC/DC IC has been changed over time in the M5StickC. The DC/DC IC in mine is marked SCAJF and the externally connected components look suspiciously like the 5VOUT_BOOST in the M5StickCPlus schematic.

This would at least explain the different results regarding on/off capability.

Thanks
Felix

]]>https://community.m5stack.com/post/25576https://community.m5stack.com/post/25576Mon, 17 Jun 2024 09:21:50 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Mon, 17 Jun 2024 07:43:32 GMT]]>So, according to schematic switching off 5V is fundamentally impossible. IPSOUT via L1 and D3 allways present at output.

DCBoost.jpg

]]>https://community.m5stack.com/post/25574https://community.m5stack.com/post/25574Mon, 17 Jun 2024 07:43:32 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Mon, 17 Jun 2024 06:15:10 GMT]]>@felmue I tested it:
void AXP192::SetPeripherialsPower(uint8_t state) {
if (!state){
Write1Byte(0x10, Read8bit(0x10) & 0XFB);
Write1Byte(0x12, Read8bit(0x12) & 0XBF);
}
else if (state) {
Write1Byte(0x10, Read8bit(0x10) | 0X04);
Write1Byte(0x12, Read8bit(0x12) | 0X40);
}

EXT_BOOST_EN controlled correctly, DC-Boost stops generating, but bypassed input Vbatt to 5V output.

What an idiot designed this part of schematic?

I could not identify DC-Boost IC(Sot-23-5 marked IB3KB)/

]]>https://community.m5stack.com/post/25572https://community.m5stack.com/post/25572Mon, 17 Jun 2024 06:15:10 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Sun, 16 Jun 2024 16:10:56 GMT]]>Hello @Kabron

hmm, I've tested with an M5StickC (not Plus, not Plus2) powered by USB-C (or battery) and an LED attached to the Groove port.

I agree, EXT_BOOST_EN needs to be turned on, which is exactly what the function I pointed out does. It sets bit 2 of register 0x10 of the AXP. See here. And here - page 34.

Edit: I just remembered, I think there was a similar discussion a couple of years ago. EXTEN actually seems to exist in two places. Bit 2 in register 0x10 and bit 6 in register 0x12.

Maybe try to manipulate bit 6 in register 0x12 to see if that works for you?

Thanks
Felix

]]>https://community.m5stack.com/post/25570https://community.m5stack.com/post/25570Sun, 16 Jun 2024 16:10:56 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Sun, 16 Jun 2024 13:08:38 GMT]]>@felmue It only switched 5V to Vbatt
I see the only way to reconnect EXT_BOOST_EN of the BOOST converter to VESP_3V3.

]]>https://community.m5stack.com/post/25569https://community.m5stack.com/post/25569Sun, 16 Jun 2024 13:08:38 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Sun, 16 Jun 2024 12:26:31 GMT]]>I tested it - does not work at all

]]>https://community.m5stack.com/post/25568https://community.m5stack.com/post/25568Sun, 16 Jun 2024 12:26:31 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Sat, 15 Jun 2024 19:38:35 GMT]]>Hello @HappyUser

you can use this function to control the output of 5 V out (and Groove port):

M5.Axp.SetPeripherialsPower(true or false);

Thanks
Felix

]]>https://community.m5stack.com/post/25564https://community.m5stack.com/post/25564Sat, 15 Jun 2024 19:38:35 GMT<![CDATA[Reply to M5StickC : how to switch 5V out off? on Sat, 15 Jun 2024 13:45:45 GMT]]>Join the question
Obviously EXT_VDD is enabled via EXT_BOOST_EN pin of the AXP192, so it must be a way to control it.

]]>https://community.m5stack.com/post/25562https://community.m5stack.com/post/25562Sat, 15 Jun 2024 13:45:45 GMT