defmt

defmt is used at run time in 401 crates (of which 291 optionally). It is a direct run-time dependency in 353 crates. It's used only as a dev dependency in 28 crates (of which 24 directly).

Number of dependers	defmt version	Downloads/month
402	0.3.8	73K
1	0.3.6	10K
1	0.3.5	16K
1	0.3.2	1.2K
17	0.2.3	210
7	0.1.3	0

Depender (with downloads and own rev deps)			defmt version
1.1M	161	rgb	optional	^0.3.8
768K	431	heapless	optional	>=0.2.0, <0.4
376K	71	embedded-io	optional	^0.3
340K	209	postcard	optional	^0.3
321K	396	nb	optional	^0.3
236K	1136	embedded-hal	optional	^0.3
81K	44	smoltcp	optional	^0.3
24K	51	defmt-rtt		^0.3
73K	66	embassy-sync	optional	^0.3
61K	96	fugit	optional	>=0.2.0, <0.4
51K	59	embedded-io-async	optional	^0.3
49K	131	embedded-hal-async	optional	^0.3
40K	18	uhlc	optional	^0.3.2
35K	48	embassy-futures	optional	^0.3
33K	61	embedded-graphics-core	optional	^0.3.2
30K	108	usb-device	optional	^0.3
27K	35	embassy-executor	optional	^0.3
28K	163	embedded-graphics	optional	^0.3.2
23K	62	embassy-time	optional	^0.3
21K	51	panic-probe	optional	^0.3
19K	38	display-interface	optional	^0.3
19K	14	stm32h7xx-hal	optional	>=0.2.0, <0.4
15K	8	embassy-usb-driver	optional	^0.3
15K	20	esp-println	optional	^0.3.8
14K	18	esp-backtrace	optional	^0.3.8
14K	27	embedded-hal-bus	optional	^0.3
13K	1	embassy-usb-synopsys-otg	optional	^0.3
12K	23	embedded-svc	optional	^0.3
11K	7	arbitrary-int	optional	^0.3.5
10K	2	esp32s2	optional	^0.3.6
11K	2	esp32s3	optional	^0.3.6
9.1K	50	rp2040-hal	optional	>=0.2.0, <0.4
8.7K	7	embassy-net-driver	optional	^0.3
7.8K	42	stm32f4xx-hal	optional	^0.3.5
7.3K	8	embassy-usb	optional	^0.3
7.1K	38	atsamd-hal	optional	^0.3.4
6.9K	3	embassy-net	optional	^0.3
6.6K	3	esp32c3	optional	^0.3.6
6.4K	6	embassy-net-driver-channel	optional	^0.3
6.4K	5	stm32-fmc	optional	^0.3
6.2K	2	esp32	optional	^0.3.6
6.2K	7	esp-hal-common	optional	=0.3.5
6.1K	1	embedded-test	optional	^0.3.8
6.1K	5	ieee802154	optional	>=0.2.0, <0.4
5.8K	19	bxcan	optional	>=0.2.3, <0.4.0
5.6K	2	esp32c6	optional	^0.3.6
5.6K	7	lis3dh-async	optional	^0.3
5.2K	2	esp32c2	optional	^0.3.6
5.2K	2	esp32h2	optional	^0.3.6
4.5K	13	usbd-hid	optional	^0.3
1.1K	8	defmt-test		^0.3
3.8K	16	bbqueue	optional	^0.3.0
3.7K	8	esp-hal	optional	^0.3.8
3.5K	8	embassy-embedded-hal	optional	^0.3
2.9K	18	embedded-sdmmc	optional	^0.3
2.5K	3	embassy-hal-internal	optional	^0.3
440		nct3933		^0.3
1.7K	2	sequential-storage	optional	^0.3
360	1	braid-triggerbox-comms		^0.3.0
1.5K		esp-wifi	optional	^0.3.8
1.3K	7	atat	optional	^0.3
280		icm426xx		0.3.*
1.3K	1	esp32c6-lp	optional	^0.3.6
1.3K	7	embassy-stm32	optional	^0.3
1.2K	1	esp-hal-embassy	optional	^0.3.8
240		defmt-brtt		^0.3
1.1K	1	rtic-sync	optional	^0.3
1.1K	2	imxrt-usbd	optional	^0.3
1.1K	1	picoserve	optional	^0.3.6
1.0K	1	esp32s3-ulp	optional	^0.3.6
1.0K	1	esp32s2-ulp	optional	^0.3.6
180		spi-memory-async		^0.3
1.0K		defmt-or-log	optional	^0.3.5
1.0K		stm32f4-staging	optional	^0.3.5
1.0K		serial-sensors-proto	optional	^0.3.8
150		sim7020		^0.3
900	7	embassy-rp	optional	^0.3
120	2	rmk		^0.3
110		gc9a01		^0.3
110		lora-phy		^0.3
100		cotton-w5500		>=0.3.2, <0.3.7
800		dw3000-ng	optional	^0.3
	1	negicon-protocol		^0.3
750		json-lines	optional	^0.3
		bind-hal		^0.3
		is31fl3743b		^0.3
700		ya-smoltcp	optional	^0.3
700	3	embedded-tls	optional	^0.3
	1	ambiq-hal		^0.3
650		serde-csv-core	optional	^0.3.4
		stm32-hal2		^0.3.4
	1	defmt-bbq		^0.3
600	1	postcard-rpc	optional	^0.3.5
	1	blue_hal		^0.2
		jewel		^0.3.5
600	1	lsm303dlhc-registers	optional	^0.3.8
		blues-notecard		^0.3
		iqs5xx		^0.3
		canopen_rust		^0.3.5
	3	atsam4-hal		^0.3
		elmar-mppt		^0.3.2
		aps490_pfpu2_mini		^0.3
		alkyn		^0.3.0
		threadx-rs		^0.3
		epd		^0.3
550	1	nourl	optional	^0.3
550		reqwless	optional	^0.3
	1	printhor-hwi_nucleo_64_arduino_cnc_hat		^0.3
550	5	rmodbus	optional	^0.3.0
		sharp-memory-display		^0.3.0
		nucleo-h743zi		^0.3.1
		defmt-itm		^0.3
	1	printhor-hwi_mks_robin_nano		^0.3
	1	printhor-hwi_skr_mini_e3		^0.3
		robokit		^0.3
		usbd-ethernet		^0.3
		servo-pio		^0.3
		log-to-defmt		^0.3
		bmp280-rs		^0.3.5
		ism330dhcx		^0.3
		manchester-code		^0.3.0
		mini-slcan		^0.1.0
		defmt-ringbuf		^0.3
		esp32-wroom-rp		^0.3
		icm20948_driver		^0.3.0
		mnemos		^0.3.0
		ovl-atsamx7x-hal		^0.3.0
		sdmmc-spi		^0.3.2
		loadstone		^0.2
		ublox-cellular-rs		^0.2
		ublox-short-range-rs		^0.2
		defmt-log-test		^0.2.1
		itla		^0.3
		phm-worker		^0.3.0
	1	usb-pd		^0.3.5
	1	microbit-bsp		^0.3
		pio-uart		^0.3.5
		atwinc1500		^0.3.0
	1	embedded-registers-derive		^0.3.5
		defmt-rtt-target		^0.3.0
		hmc5883-async		^0.3.2
		defmt-serial		^0.3
		utrace		^0.3.6
		aht20-driver		^0.3.6
		bmp390		^0.3.8
		can2040		^0.3
500	1	coordinate-frame	optional	^0.3.8
		usbh		^0.3.5
		a7105		^0.3
		bitbot_bsp		^0.3
		embedded-devices		^0.3.5
		fusb302b		^0.3.5
		lp586x		^0.3
		rmk-rp2040		^0.3
500	8	stm32f3xx-hal	optional	>=0.2.3, <0.4.0
500	6	eeprom24x	optional	^0.3.6
490	6	esp-hal-smartled	optional	^0.3.8
430		lsm303dlhc-ng	optional	^0.3.8
420		esp32p4	optional	^0.3.6
420	1	cyw43	optional	^0.3
410		cyw43-pio	optional	^0.3
400	6	at-commands	optional	^0.3
400	7	embassy-nrf	optional	^0.3
380		efm32pg1b-pac	optional	^0.3.6
380		w5500-dns	optional	^0.3.8
360	3	mantra-rust-macros	optional	^0.3.6
360	1	l3gd20-registers	optional	^0.3.8
350	3	embassy-boot	optional	^0.3
340		fusion-imu	optional	^0.3.8
310		mcp3424	optional	0.3.*
310		ethercrab	optional	^0.3.5
290		embassy-net-wiznet	optional	^0.3
220	1	ethercrab-wire	optional	^0.3.5
220		radio-sx128x	optional	^0.3.5
220	1	va108xx-hal	optional	^0.3
220		ublox-sockets	optional	^0.3
200	3	imxrt-log	optional	^0.3
210		l3gd20-ng	optional	^0.3.8
200	2	w5500-ll	optional	^0.3.8
200		ector	optional	^0.3
190		l0g	optional	^0.3
190	1	usbd-human-interface-device	optional	^0.3
190	5	w5500-hl	optional	^0.3.8
190	4	infrared	optional	^0.3
180		wii-ext	optional	^0.3.0
170	1	nrf-softdevice	optional	^0.3
170		own_or_borrow	optional	^0.3.8
170		embedded-bacnet	optional	^0.3.5
160		femtopb	optional	^0.3.6
160	1	max116xx-10bit	optional	^0.3
140		embassy-boot-stm32	optional	^0.3
140		emc2101	optional	^0.3.8
140		minicbor-embedded-io	optional	^0.3
140	2	w5500	optional	^0.3
140		scd4x	optional	^0.3.0
140		va416xx-hal	optional	^0.3
140		ghostfat	optional	^0.3.1
140		w5500-sntp	optional	^0.3.8
140	5	wasefire-logger	optional	^0.3.8
130		mmc5983ma	optional	^0.3.8
140		nrf-modem	optional	^0.3
140		w5500-dhcp	optional	^0.3.8
140		w5500-mqtt	optional	^0.3.8
130	2	kiibohd-hall-effect	optional	^0.3
130	8	wasefire-error	optional	^0.3.8
130		pcf85063a	optional	^0.3
120		rust-mqtt	optional	^0.3
120	1	aemics-stm32g4xx-hal	optional	^0.3.2
120		fundamentum-edge-mcu-http-client	optional	^0.3
110		pas-co2-rs	optional	^0.3
100		a121-rs	optional	^0.3
110		embassy-boot-nrf	optional	^0.3
110	1	ieee802_3_miim	optional	^0.3
110	2	wasefire-board-api	optional	^0.3.8
100		bme280	optional	^0.3.5
100	1	kll-hid	optional	^0.3
100	7	kll-core	optional	^0.3
100		wasefire-scheduler	optional	^0.3.8
		socketcand	optional	^0.3.6
	2	wasefire-protocol-usb	optional	^0.3.8
	1	i2c-pio	optional	^0.3.0
		nucleo-wl55jc-bsp	optional	^0.3
		stm32h5	optional	^0.3.5
		embassy-dht-sensor	optional	^0.3
	2	qingke	optional	^0.3.6
	1	embedded-update	optional	^0.3
	1	ppproto	optional	^0.3
		bern-kernel	optional	^0.3
		nrf-dfu-target	optional	^0.3
		usbd-storage	optional	^0.3
		embedded-hal-compat	optional	^0.3.0
	3	hid-io-protocol	optional	^0.3
	2	midi-types	optional	^0.3.2
		adafruit-bluefruit-protocol	optional	^0.3
		adafruit-lcd-backpack	optional	^0.3
	1	adi-adxl355	optional	^0.3
		adi-adxl355-async	optional	^0.3
		async-button	optional	^0.3.5
		bbqueue-sync	optional	^0.3.0
		block-device-adapters	optional	^0.3
		bm1397-protocol	optional	^0.3.4
		bmp180-embedded-hal	optional	^0.3.6
		bno055	optional	^0.3
		bq27xxx	optional	^0.3
	2	byte-slab	optional	^0.3.0
		caprand	optional	^0.3
		crsf	optional	^0.3.6
		dcc-rs	optional	^0.3
		dfr0299	optional	^0.3
	1	dmx-rdm	optional	^0.3
		drogue-ajour-protocol	optional	^0.3
		drogue-tls	optional	^0.3
		drv8305	optional	~0.2
		embassy-boot-rp	optional	^0.3
		embassy-net-adin1110	optional	^0.3
		embassy-net-enc28j60	optional	^0.3
		embassy-net-esp-hosted	optional	^0.3
		embassy-net-ppp	optional	^0.3
	2	embassy-traits	optional	^0.2.0
		embedded-drivers	optional	^0.3
		embedded-ui	optional	^0.3
		emc2101-rs	optional	^0.3.2
		erdnuss-comms	optional	^0.3
		es-wifi-driver	optional	^0.3
		factbird-common	optional	^0.2
		ft6236	optional	^0.3.4
	1	hftwo	optional	^0.3
		hp203b	optional	^0.3.2
		hts221-async	optional	^0.3
		hub75-remastered	optional	^0.3.6
		ina260-async	optional	^0.3.2
		it7259	optional	^0.3.4
		kc11b04	optional	^0.3
	1	kiibohd-hid-io	optional	^0.3
	2	kiibohd-keyscanning	optional	^0.3
	1	kiibohd-usb	optional	^0.3
		libscd	optional	^0.3
		lora-e5-bsp	optional	^0.3
	2	lora-modulation	optional	^0
	1	lorawan	optional	^0.3
	1	lorawan-device	optional	^0.3
		lsm6ds3tr	optional	^0.3.5
		ltc690x	optional	^0.2.3
		max145784-driver	optional	^0.3
		max14578e-driver	optional	^0.3
		max7219-async	optional	^0.3
		max7797x-driver	optional	^0.3
		mcp2515	optional	^0.3.2
		mcp4725-async	optional	^0.3
		memory-lcd-spi	optional	^0.3.4
	2	midi-convert	optional	^0.3.2
		mini-rxtx	optional	^0.3.1
		mlx9061x	optional	^0.3.6
	2	mnemos-common	optional	^0.3
	1	moonboot	optional	^0.2
		mqtt-sn	optional	^0.2
	2	mqttrust	optional	^0.3
	1	mqttrust_core	optional	^0.3
		nau88c22	optional	^0.3.5
		neotron-bmc-protocol	optional	^0.3
		nobcd	optional	^0.3
		nrf24radio	optional	^0.3
		oled	optional	^0.3.4
		orouter-serial	optional	^0.3.1
		orouter-wireless	optional	^0.3.2
	2	phm-icd	optional	^0.3.0
		pid-lite	optional	^0.2
		platform-switch	optional	^0.3
		prinThor	optional	^0.3.5
	5	printhor-hwa-common	optional	^0.3
	6	radio	optional	^0.3.0
		radio-at86rf23x	optional	^0.3.0
		radio-sx1231	optional	^0.3
	1	rotary-encoder-hal	optional	^0.1.2
		rustot	optional	^0.3
		satrs	optional	^0.3
	3	satrs-shared	optional	^0.3
		seeed-lora-e5-at-commands	optional	^0.3
	1	sh1107	optional	^0.3.2
		sht4x	optional	^0.3.2
		sirena	optional	^0.3
		sitronix-touch	optional	^0.3.4
	5	sixtyfps-corelib	optional	^0.3.0
		smoltcp-rmodbus	optional	^0.3.6
	3	spacepackets	optional	^0.3
		stemma-soil-sensor-embassy	optional	^0.3
		stm32-bootloader-client	optional	^0.2.1
		stm32-eth	optional	^0.3
		stm32f3xx-hal-v2	optional	^0.1.2
		stm32g473-hal_oppe	optional	^0.3.0
	1	stm32g4xx-hal	optional	^0.3.2
		stm32wb-hci	optional	^0.3
	2	stm32wlxx-hal	optional	^0.3
	2	sunset	optional	^0.3
	1	sunset-embassy	optional	^0.3
		tai-time	optional	^0.3
		tb6612fng	optional	^0.3
		tca9555	optional	^0.3
		the-bridge	optional	^0.3.6
		tinygif	optional	^0.3.4
		tlv320aic23	optional	=0.3.2
		tm1637-embedded-hal	optional	^0.3.6
		tmp117	optional	^0.3
		trenchcoat	optional	^0.3
	1	uftwo	optional	^0.3
		usbd-picotool-reset	optional	>=0.2.0, <0.4
		vl53l4cd	optional	^0.3
		vlcb-defs	optional	^0.3
		w25q32jv	optional	^0.3
	1	w5500-tls	optional	^0.3.8
		xpt2046	optional	^0.3.0
39K	32	bitfield-struct	dev	^0.3
7.7K	15	rp-pico	dev	^0.3.5
470	4	imxrt-hal	dev	^0.3
390		rp2040-flash	dev	^0.3.2
200		sparkfun-micromod-rp2040	dev	^0.3.5
190		sht25	dev	^0.3
160	5	teensy4-bsp	dev	^0.3
	1	dwm1001	dev	^0.3.0
		persistent-buff	dev	^0.3
		st7565	dev	^0.3.0
		ad57xx	dev	^0.3.5
		async-stm32f1xx	dev	^0.1
		solderparty-rp2040-stamp-carrier	dev	^0.3
		jh71xx-hal	dev	^0.3
		pimoroni-tiny2040	dev	^0.3.5
		stk8ba58	dev	^0.3.6
		epd-spectra	dev	^0.3.6
		is31fl3193	dev	^0.3.2
		daisy	dev	^0.3.8
		rucos-cortex-m	dev	^0.3
		lpc546xx-hal	dev	^0.3.0
		oled_async	dev	^0.3
		pimoroni-plasma-2040	dev	^0.3.5
		adafruit-featherwing-oled128x64	dev	^0.3.2
	1	pimoroni-servo2040	dev	^0.3.5
		cortex-m-microclock	dev	^0.3.4