defmt

defmt is used at run time in 458 crates (of which 331 optionally). It is a direct run-time dependency in 401 crates. It's used only as a dev dependency in 35 crates (of which 29 directly).

Number of dependers	defmt version	Downloads/month
465	0.3.8	125K
1	0.3.6	2.4K
1	0.3.5	11K
1	0.3.2	1.3K
18	0.2.3	550
7	0.1.3	70

Depender (with downloads and own rev deps)			defmt version
1.0M	176	rgb	optional	^0.3.8
965K	470	heapless	optional	>=0.2.0, <0.4
890K	102	embedded-io	optional	^0.3
510K	251	postcard	optional	^0.3
314K	409	nb	optional	^0.3
255K	1207	embedded-hal	optional	^0.3
118K	47	smoltcp	optional	^0.3
29K	61	defmt-rtt		^0.3
84K	31	serde-json-core	optional	^0.3
79K	76	embassy-sync	optional	^0.3
69K	167	embedded-hal-async	optional	^0.3
64K	105	fugit	optional	>=0.2.0, <0.4
63K	20	uhlc	optional	^0.3.2
59K	82	embedded-io-async	optional	^0.3
48K	62	embassy-futures	optional	^0.3
40K	113	usb-device	optional	^0.3
30K	9	arbitrary-int	optional	^0.3.5
30K	78	embassy-time	optional	^0.3
29K	60	panic-probe	optional	^0.3
27K	43	embassy-executor	optional	^0.3
27K	167	embedded-graphics	optional	^0.3.2
26K	65	embedded-graphics-core	optional	^0.3.2
22K	21	esp-println	optional	^0.3.8
21K	2	esp32s3	optional	^0.3.8
20K	35	embedded-hal-bus	optional	^0.3
21K	19	esp-backtrace	optional	^0.3.8
19K	8	embassy-usb-driver	optional	^0.3
18K	11	esp-hal	optional	^0.3.8
16K	39	display-interface	optional	^0.3
15K	2	esp32s2	optional	^0.3.8
14K	14	stm32h7xx-hal	optional	>=0.2.0, <0.4
12K	52	rp2040-hal	optional	>=0.2.0, <0.4
11K	9	embassy-embedded-hal	optional	^0.3
11K	2	esp-wifi-sys	optional	^0.3.8
11K	4	esp32c3	optional	^0.3.8
11K	22	embedded-svc	optional	^0.3
10K	1	embedded-test	optional	^0.3.8
9.7K	2	esp32	optional	^0.3.8
9.4K	7	embassy-net-driver	optional	^0.3
9.4K	2	esp32c6	optional	^0.3.8
8.5K	38	atsamd-hal	optional	^0.3.4
8.5K	3	embassy-hal-internal	optional	^0.3
8.2K	2	esp32h2	optional	^0.3.8
8.1K	2	esp32c2	optional	^0.3.8
8.0K	1	bt-hci	optional	^0.3
7.7K	6	stm32-fmc	optional	^0.3
7.3K	4	embassy-net	optional	^0.3
7.0K	9	embassy-rp	optional	^0.3
6.9K	10	embassy-usb	optional	^0.3
6.8K	44	stm32f4xx-hal	optional	^0.3.5
6.7K	6	embassy-net-driver-channel	optional	^0.3
6.4K	1	embassy-usb-synopsys-otg	optional	^0.3
5.8K	17	bbqueue	optional	^0.3.0
5.5K	13	usbd-hid	optional	^0.3
1.4K	1	negicon-protocol		^0.3
4.7K	5	ieee802154	optional	>=0.2.0, <0.4
4.4K	3	mac-parser	optional	^0.3.8
4.3K	19	bxcan	optional	>=0.2.3, <0.4.0
4.3K	7	lis3dh-async	optional	^0.3
4.3K		ieee80211	optional	^0.3.8
3.4K	18	embedded-sdmmc	optional	^0.3
3.1K	1	esp-wifi	optional	^0.3.8
750	8	defmt-test		^0.3
2.8K	8	atat	optional	^0.3
2.7K	3	defmt-or-log	optional	^0.3.5
2.7K	3	coap-message-implementations	optional	^0.3.8
2.4K	2	esp-hal-embassy	optional	^0.3.8
2.4K	5	sequential-storage	optional	^0.3
2.2K		mimxrt685s-pac	optional	^0.3.8
1.9K	4	postcard-rpc	optional	^0.3.5
430	1	braid-triggerbox-comms		^0.3.0
430		ft6x06-rs		^0.3.8
1.7K		femtopb	optional	^0.3.8
370	2	rmk		^0.3
1.5K	7	esp-hal-common	optional	=0.3.5
290		defmt-brtt		^0.3
1.3K	10	embassy-stm32	optional	^0.3
1.3K	7	lakers-shared	optional	^0.3
1.3K	3	error_set	optional	^0.3
1.3K	1	esp32c6-lp	optional	^0.3.6
1.3K		lakers	optional	^0.3
1.2K	3	nmea	optional	^0.3
1.2K	1	esp32s2-ulp	optional	^0.3.6
1.2K	1	esp32s3-ulp	optional	^0.3.6
230	1	embedded-registers		^0.3.8
220		steami-rs		^0.3.4
210		embedded-devices		^0.3.8
210		rv8803		^0.3
1.1K		rust-mqtt	optional	^0.3
200		pio-uart		^0.3.8
1.1K	3	rtic-sync	optional	^0.3
160		rv3032		^0.3
950	7	embassy-nrf	optional	^0.3
150		esp-fast-serial		^0.3.8
950		json-lines	optional	^0.3
900	1	embedded-nal-coap	optional	^0.3.8
110		gc9a01		^0.3
800	2	qingke	optional	^0.3.8
800	5	rmodbus	optional	^0.3.0
800	2	imxrt-usbd	optional	^0.3
		defmt-serial		^0.3
		is31fl3743b		^0.3
		spi-memory-async		^0.3
700		mini-rxtx	optional	^0.3.1
700		scd4x	optional	^0.3.0
700	1	nourl	optional	^0.3
650		stm32f1-staging	optional	^0.3.5
	1	ambiq-hal		^0.3
	1	embedded-registers-derive		^0.3.8
650	1	reqwless	optional	^0.3
650		embassy-net-wiznet	optional	^0.3
650	1	stm32f4-staging	optional	^0.3.5
600	2	embedded-tls	optional	^0.3
600	1	ieee802_3_miim	optional	^0.3
		jewel		^0.3.5
		blues-notecard		^0.3
		iqs5xx		^0.3
	1	stm32-hal2		^0.3.4
		lora-phy		^0.3
		robokit		^0.3
		elmar-mppt		^0.3.2
550		efm32pg1b-pac	optional	^0.3.6
		log-to-defmt		^0.3
		sdmmc-spi		^0.3.2
		alkyn		^0.3.0
		embedded-nrf24l01-async		^0.3
		lp586x		^0.3
	1	printhor-hwi_nucleo_64_arduino_cnc_hat		^0.3
		threadx-rs		^0.3
		hcsr04_async		^0.3.8
		nucleo-h743zi		^0.3.1
	3	atsam4-hal		^0.3
550	1	cody-c	optional	^0.3.6
		defmt-itm		^0.3
	1	printhor-hwi_mks_robin_nano		^0.3
	1	printhor-hwi_skr_mini_e3		^0.3
		itla		^0.3
		atwinc1500		^0.3.0
		mnemos		^0.3.0
		bmp280-rs		^0.3.5
		icm426xx		0.3.*
		manchester-code		^0.3.0
		mini-slcan		^0.1.0
		servo-pio		^0.3
		bmp390		^0.3.8
		defmt-ringbuf		^0.3
		esp32-wroom-rp		^0.3
		ovl-atsamx7x-hal		^0.3.0
		sharp-memory-display		^0.3.0
		loadstone		^0.2
500	1	ppproto	optional	^0.3.8
		aps490_pfpu2_mini		^0.3
		defmt-log-test		^0.2.1
		defmt-rtt-target		^0.3.0
		pa-spl		^0.3.8
		phm-worker		^0.3.0
	1	microbit-bsp		^0.3
		mini-slcan-ng		0.3.*
		rmk-rp2040		^0.3
		ublox-short-range-rs		^0.2
	1	usb-pd		^0.3.5
		ac4490		^0.3
		ad7124-rs		^0.3
		can2040		^0.3
		hmc5883-async		^0.3.2
		usbd-ethernet		^0.3
		usbh		^0.3.5
		utrace		^0.3.6
		canopen_rust		^0.3.5
		cotton-w5500		>=0.3.2, <0.3.7
		icm20948_driver		^0.3.0
		ism330dhcx		^0.3
		ublox-cellular-rs		^0.2
	1	blue_hal		^0.2
	1	defmt-bbq		^0.3
		epd		^0.3
		nct3933		^0.3
		a7105		^0.3
		bitbot_bsp		^0.3
		fusb302b		^0.3.5
480		errore	optional	^0.3.8
460	8	stm32f3xx-hal	optional	>=0.2.3, <0.4.0
440		sht4x-ng	optional	^0.3.8
440	6	at-commands	optional	^0.3
420		i2c-character-display	optional	^0.3
400		ya-smoltcp	optional	^0.3
390	1	cyw43	optional	^0.3
380		cyw43-pio	optional	^0.3
370		heapless_topo	optional	>=0.2.0, <0.4
360	6	eeprom24x	optional	^0.3.6
350	3	imxrt-log	optional	^0.3
310		esp-ieee802154	optional	^0.3.8
300	3	embassy-boot	optional	^0.3
300		esp32p4	optional	^0.3.6
300		stm32h5	optional	^0.3.5
270	1	dmx-rdm	optional	^0.3
270		serde-csv-core	optional	^0.3.4
250		tai-time	optional	^0.3
230	4	spacepackets	optional	^0.3
220	1	va108xx-hal	optional	^0.3
210	1	va416xx-hal	optional	^0.3
200		bme280	optional	^0.3.5
200		ector	optional	^0.3
200		mcp2515	optional	^0.3.6
200	1	mqttrust_core	optional	^0.3
200		ds4432	optional	^0.3
180		emc2101	optional	^0.3
180		dw3000-ng	optional	^0.3
180	2	w5500-ll	optional	^0.3.8
170	5	w5500-hl	optional	^0.3.8
170		embedded-bacnet	optional	^0.3.5
160	3	lakers-ead-authz	optional	^0.3
160		usb-dfu-target	optional	^0.3.0
160		adafruit-bluefruit-protocol	optional	^0.3
150		aht20-driver	optional	^0.3.6
150		is25lp064a	optional	^0.3
150	3	mantra-rust-macros	optional	^0.3.6
150		adafruit-lcd-backpack	optional	^0.3
150		pmsa003i	optional	^0.3.8
150	3	satrs-shared	optional	^0.3
140		stm32h5-staging	optional	^0.3.5
140		microscpi	optional	^0.3
140		embassy-dht-sensor	optional	^0.3
140		satrs	optional	^0.3
130	1	nrf-softdevice	optional	^0.3
130		w5500-dhcp	optional	^0.3.8
120	1	picoserve	optional	^0.3.6
120		a121-rs	optional	^0.3
110		bno055	optional	^0.3
110	2	midi-types	optional	^0.3.2
110		dap-rs	optional	^0.3
110	4	infrared	optional	^0.3
100	1	max116xx-10bit	optional	^0.3
100	2	midi-convert	optional	^0.3.2
100		sim7020	optional	^0.3
		ethercrab	optional	^0.3.5
		embassy-boot-stm32	optional	^0.3
	1	embedded-hal-compat	optional	^0.3.0
	6	esp-hal-smartled	optional	^0.3.8
		n32g4xx-hal	optional	^0.3.5
		embassy-boot-rp	optional	^0.3
		nucleo-wl55jc-bsp	optional	^0.3
	2	w5500	optional	^0.3
		l0g	optional	^0.3
		stm32-eth	optional	^0.3
		tm1637-embedded-hal	optional	^0.3.6
	1	usbd-human-interface-device	optional	^0.3
		embassy-boot-nrf	optional	^0.3
	1	ethercrab-wire	optional	^0.3.5
	1	i2c-pio	optional	^0.3.0
		embedded-ads1220	optional	^0.3.8
		w5500-mqtt	optional	^0.3.8
	1	kll-hid	optional	^0.3
	5	sixtyfps-corelib	optional	^0.3.0
	1	hftwo	optional	^0.3
		nrf-dfu-target	optional	^0.3
	7	kll-core	optional	^0.3
	1	rp235x-hal	optional	>=0.2.0, <0.4
		max7219-async	optional	^0.3
		stm32wb-hci	optional	^0.3
	1	adi-adxl355	optional	^0.3
		adi-adxl355-async	optional	^0.3
	1	aemics-stm32g4xx-hal	optional	^0.3.2
		async-button	optional	^0.3.5
		bbqueue-sync	optional	^0.3.0
		bern-kernel	optional	^0.3
		bind-hal	optional	^0.3
		block-device-adapters	optional	^0.3
		bm1397-protocol	optional	^0.3.4
		bmp180-embedded-hal	optional	^0.3.6
		bq2515x	optional	^0.3
		bq27xxx	optional	^0.3
	2	bxcan-ng	optional	>=0.2.3, <0.4.0
	2	byte-slab	optional	^0.3.0
		caprand	optional	^0.3
		cfdp-rs	optional	^0.3
	1	coordinate-frame	optional	^0.3.8
		crsf	optional	^0.3.6
		dcc-rs	optional	^0.3
		dfr0299	optional	^0.3
		drogue-ajour-protocol	optional	^0.3
		drogue-tls	optional	^0.3
		drv8305	optional	~0.2
		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
	1	embedded-update	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
		fdc1004	optional	^0.3.8
		ft6236	optional	^0.3.4
		fundamentum-edge-mcu-http-client	optional	^0.3
		fusion-imu	optional	^0.3.8
		ghostfat	optional	^0.3.1
	3	hid-io-protocol	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
	2	kiibohd-hall-effect	optional	^0.3
	1	kiibohd-hid-io	optional	^0.3
	2	kiibohd-keyscanning	optional	^0.3
	1	kiibohd-usb	optional	^0.3
		l3gd20-ng	optional	^0.3.8
	1	l3gd20-registers	optional	^0.3.8
		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
		lsm303dlhc-ng	optional	^0.3.8
	1	lsm303dlhc-registers	optional	^0.3.8
		lsm6ds3tr	optional	^0.3.5
		ltc690x	optional	^0.2.3
		max145784-driver	optional	^0.3
		max14578e-driver	optional	^0.3
		max7797x-driver	optional	^0.3
		mcp3424	optional	0.3.*
		mcp4725-async	optional	^0.3
		memory-lcd-spi	optional	^0.3.4
		minicbor-embedded-io	optional	^0.3
		mlx9061x	optional	^0.3.6
		mmc5983ma	optional	^0.3.8
	2	mnemos-common	optional	^0.3
	1	moonboot	optional	^0.2
		mqtt-sn	optional	^0.2
	2	mqttrust	optional	^0.3
		nau88c22	optional	^0.3.5
		neotron-bmc-protocol	optional	^0.3
		nobcd	optional	^0.3
		nrf-modem	optional	^0.3
		nrf24radio	optional	^0.3
		oled	optional	^0.3.4
		orouter-serial	optional	^0.3.1
		orouter-wireless	optional	^0.3.2
		own_or_borrow	optional	^0.3.8
		pas-co2-rs	optional	^0.3
		pcf85063a	optional	^0.3
	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
		py32-bind-hal	optional	^0.3
	6	radio	optional	^0.3.0
		radio-at86rf23x	optional	^0.3.0
		radio-sx1231	optional	^0.3
		radio-sx128x	optional	^0.3.5
	1	rotary-encoder-hal	optional	^0.1.2
		rustot	optional	^0.3
		seeed-lora-e5-at-commands	optional	^0.3
		serial-sensors-proto	optional	^0.3.8
	1	sh1107	optional	^0.3.2
		sht4x	optional	^0.3.2
		sirena	optional	^0.3
		sitronix-touch	optional	^0.3.4
		smoltcp-rmodbus	optional	^0.3.6
		socketcand	optional	^0.3.6
		stemma-soil-sensor-embassy	optional	^0.3
		stm32-bootloader-client	optional	^0.2.1
		stm32f3xx-hal-v2	optional	^0.1.2
		stm32g473-hal_oppe	optional	^0.3.0
	1	stm32g4xx-hal	optional	^0.3.2
	2	stm32wlxx-hal	optional	^0.3
		stratum-v1	optional	^0.3
	2	sunset	optional	^0.3
	1	sunset-embassy	optional	^0.3
		tb6612fng	optional	^0.3
		tca9555	optional	^0.3
		telit-me310g1	optional	^0.3
		tinygif	optional	^0.3.4
		tlv320aic23	optional	=0.3.2
		tmp117	optional	^0.3
		trenchcoat	optional	^0.3
		ublox-sockets	optional	^0.3
	1	uftwo	optional	^0.3
		usbd-picotool-reset	optional	>=0.2.0, <0.4
		usbd-storage	optional	^0.3
		vl53l4cd	optional	^0.3
		vlcb-defs	optional	^0.3
		w25q32jv	optional	^0.3
		w5500-dns	optional	^0.3.8
		w5500-sntp	optional	^0.3.8
	1	w5500-tls	optional	^0.3.8
	2	wasefire-board-api	optional	^0.3.8
	8	wasefire-error	optional	^0.3.8
	5	wasefire-logger	optional	^0.3.8
	2	wasefire-protocol-usb	optional	^0.3.8
		wasefire-scheduler	optional	^0.3.8
		wii-ext	optional	^0.3.0
		xpt2046	optional	^0.3.0
56K	42	bitfield-struct	dev	^0.3
10K	15	rp-pico	dev	^0.3.5
7.4K	30	ssd1306	dev	^0.3.6
1.1K	4	imxrt-hal	dev	^0.3
350		pimoroni-plasma-2040	dev	^0.3.5
300		lis2dtw12	dev	^0.3.8
240		epd-spectra	dev	^0.3.6
210	1	pimoroni-servo2040	dev	^0.3.5
210		py32f0xx-hal	dev	^0.3.8
180		st7565	dev	^0.3.0
180		pimoroni_interstate75	dev	^0.3.8
140		ssd1331-async	dev	^0.3.8
120		rp2040-flash	dev	^0.3.2
		pimoroni-tiny2040	dev	^0.3.5
	5	teensy4-bsp	dev	^0.3
	1	dwm1001	dev	^0.3.0
		persistent-buff	dev	^0.3
		ad57xx	dev	^0.3.5
	1	jh71xx-hal	dev	^0.3
		rucos-cortex-m	dev	^0.3
		sparkfun-micromod-rp2040	dev	^0.3.5
		is31fl3193	dev	^0.3.2
		solderparty-rp2040-stamp-carrier	dev	^0.3
		stk8ba58	dev	^0.3.6
		sht25	dev	^0.3
		lpc546xx-hal	dev	^0.3.0
		daisy	dev	^0.3.8
		async-stm32f1xx	dev	^0.1
		adafruit-featherwing-oled128x64	dev	^0.3.2
		cortex-m-microclock	dev	^0.3.4
		oled_async	dev	^0.3