defmt

defmt is used at run time in 174 crates (of which 116 optionally). It's used only as a dev dependency in 16 crates (of which 15 directly).

Number of dependers	defmt version	Downloads/month
165	0.3.2	22K
17	0.2.3	650
8	0.1.3	270

Depender (with downloads and own rev deps)			defmt version
343K	292	heapless	optional	>=0.2.0, <0.4
225K	349	nb	optional	^0.3
118K	85	postcard	optional	^0.3.0
40K	68	fugit	optional	>=0.2.0, <0.4
22K	24	smoltcp	optional	^0.3
18K	82	usb-device	optional	^0.3
17K	29	panic-probe	optional	^0.3
7.4K	32	defmt-rtt		^0.3
14K	19	embedded-io	optional	^0.3
12K	12	uhlc	optional	^0.3.2
9.8K	14	stm32h7xx-hal	optional	>=0.2.0, <0.4
8.2K	37	stm32f4xx-hal	optional	^0.3.1
7.8K	13	bbqueue	optional	^0.3.0
7.4K	11	embedded-svc	optional	^0.3
5.0K	16	bxcan	optional	>=0.2.3, <0.4.0
4.1K	4	atat	optional	^0.3
4.1K	34	rp2040-hal	optional	>=0.2.0, <0.4
2.5K	14	embassy-sync	optional	^0.3
2.4K	12	embedded-sdmmc	optional	^0.3
2.3K	14	embassy-time	optional	^0.3
2.2K	7	embassy-futures	optional	^0.3
1.7K	6	usbd-hid	optional	^0.3
1.6K	1	ya-smoltcp	optional	^0.3
1.6K	4	stm32-fmc	optional	^0.3
550	5	defmt-test		^0.3
500	1	braid-triggerbox-comms		^0.3.0
1.2K	8	stm32f3xx-hal	optional	>=0.2.3, <0.4.0
1.1K		mini-rxtx	optional	^0.3.1
1.0K	1	ieee802_3_miim	optional	^0.3
1.0K		midi-convert	optional	^0.3.2
700	2	midi-types	optional	^0.3.2
120	3	atsam4-hal		^0.3
120		defmt-bbq		^0.3
380	5	sixtyfps-corelib	optional	^0.3.0
		is31fl3743b		^0.3
		elmar-mppt		^0.3.2
		defmt-ringbuf		^0.3
		log-to-defmt		^0.3
		nucleo-h743zi		^0.3.1
		iqs5xx		^0.3
	1	ambiq-hal		^0.3
		blues-notecard		^0.3
		ism330dhcx		^0.3.2
		defmt-serial		^0.3.2
	1	blue_hal		^0.2
		aht20-driver		^0.3.0
		alkyn		^0.3.0
		servo-pio		^0.3
		defmt-itm		^0.3
		ovl-atsamx7x-hal		^0.3.0
		ublox-cellular-rs		^0.2
		ublox-short-range-rs		^0.2
		bmp280-rs		^0.1.3
		ethercrab		^0.3.2
		manchester-code		^0.3.0
		mnemos		^0.3.0
		icm20948_driver		^0.3.0
		sharp-memory-display		^0.3.0
		defmt-rtt-target		^0.3.0
		sdmmc-spi		^0.3.2
		atwinc1500		^0.3.0
		defmt-log-test		^0.2.1
		esp32-wroom-rp		^0.3
		itla		^0.3
		loadstone		^0.2
		phm-worker		^0.3.0
		thermostat-eem		^0.3.0
		mini-slcan		^0.1.0
		hmc5883-async		^0.3.2
250	4	infrared	optional	^0.3
240	1	lorawan	optional	^0.3.0
240		bme280	optional	^0.3.2
230	1	embassy-executor	optional	^0.3
200	7	kll-core	optional	^0.3
200	1	kll-hid	optional	^0.3
200		lorawan-device	optional	^0.3.0
190	2	stm32wlxx-hal	optional	^0.3
190	1	embedded-tls	optional	^0.3
180	4	at-commands	optional	^0.3
170	3	hid-io-protocol	optional	^0.3
170	6	radio	optional	^0.3.0
170	2	w5500-ll	optional	^0.3
160	4	ieee802154	optional	>=0.2.0, <0.4
140	1	i2c-pio	optional	^0.3.0
120	5	w5500-hl	optional	^0.3
100	1	kiibohd-hid-io	optional	^0.3
100		ghostfat	optional	^0.3.1
100		reqwless	optional	^0.3
	1	imxrt-log	optional	^0.3
		nucleo-wl55jc-bsp	optional	^0.3
		nrf-modem	optional	^0.3.2
	2	kiibohd-hall-effect	optional	^0.3
	2	kiibohd-keyscanning	optional	^0.3
	1	kiibohd-usb	optional	^0.3
		dfr0299	optional	^0.3
	1	nourl	optional	^0.3
	1	embedded-update	optional	^0.3
		lora-e5-bsp	optional	^0.3
	1	w5500-tls	optional	^0.3
		rust-mqtt	optional	^0.3
	2	mqttrust	optional	^0.3
		w5500-dhcp	optional	^0.3
	1	rotary-encoder-hal	optional	^0.1.2
		w5500-mqtt	optional	^0.3
	2	wasefire-logger	optional	^0.3.2
		embedded-hal-compat	optional	^0.3.0
		usbd-picotool-reset	optional	>=0.2.0, <0.4
		stm32-eth	optional	^0.3
		ublox-sockets	optional	^0.3
	2	embassy-traits	optional	^0.2.0
		lsm6ds3tr	optional	^0.3.2
	2	phm-icd	optional	^0.3.0
	2	byte-slab	optional	^0.3.0
		trenchcoat	optional	^0.3
		bern-kernel	optional	^0.3
		mcp2515	optional	^0.3.2
	1	mqttrust_core	optional	^0.3
	1	moonboot	optional	^0.2
		hp203b	optional	^0.3.2
		wasefire-scheduler	optional	^0.3.2
		es-wifi-driver	optional	^0.3
	2	mnemos-common	optional	^0.3
		stm32f3xx-hal-v2	optional	^0.1.2
		wii-ext	optional	^0.3.0
		rustot	optional	^0.3
		sequential-storage	optional	^0.3
		w5500-dns	optional	^0.3
		lis3dh-async	optional	^0.3
	1	sh1107	optional	^0.3.2
		ector	optional	^0.3
		radio-sx1231	optional	^0.3
		dcc-rs	optional	^0.3
		drogue-ajour-protocol	optional	^0.3
		drogue-tls	optional	^0.3
		embassy-boot	optional	^0.3
		hts221-async	optional	^0.3
		tb6612fng	optional	^0.3
		w5500-sntp	optional	^0.3
		factbird-common	optional	^0.2
		ltc690x	optional	^0.2.3
		nobcd	optional	^0.3
		sht4x	optional	^0.3.2
		sirena	optional	^0.3
		adafruit-bluefruit-protocol	optional	^0.3
		drv8305	optional	~0.2
		embedded-drivers	optional	^0.3
		radio-sx128x	optional	^0.3.0
		stm32g473-hal_oppe	optional	^0.3.0
		xpt2046	optional	^0.3.0
		bbqueue-sync	optional	^0.3.0
		mqtt-sn	optional	^0.2
		radio-at86rf23x	optional	^0.3.0
		stm32-bootloader-client	optional	^0.2.1
		tca9555	optional	^0.3
3.3K	7	rp-pico	dev	^0.3.0
230	3	imxrt-hal	dev	^0.3
		adafruit-featherwing-oled128x64	dev	^0.3.2
		async-stm32f1xx	dev	^0.1
	1	dwm1001	dev	^0.3.0
		is31fl3193	dev	^0.3.2
		lpc546xx-hal	dev	^0.3.0
		persistent-buff	dev	^0.3
		pimoroni-plasma-2040	dev	^0.3.0
	1	pimoroni-servo2040	dev	^0.3.0
		pimoroni-tiny2040	dev	^0.3.0
		rp2040-flash	dev	^0.3.2
		sht25	dev	^0.3
		solderparty-rp2040-stamp-carrier	dev	^0.3
		st7565	dev	^0.3.0
110		teensy4-bsp	dev	^0.3