defmt

defmt is used at run time in 533 crates (of which 396 optionally). It's used only as a dev dependency in 36 crates (of which 30 directly).

Number of dependers	defmt version	Downloads/month
0	1.0.0-rc.1	0
542	0.3.10	151K
1	0.3.6	2.3K
1	0.3.5	11K
1	0.3.2	1.5K
17	0.2.3	360
7	0.1.3	45

Depender (with downloads and own rev deps)			defmt version
1.0M	504	heapless	optional	>=0.2.0, <0.4
1.0M	179	rgb	optional	^0.3.8
916K	120	embedded-io	optional	^0.3
542K	292	postcard	optional	^0.3
411K	411	nb	optional	^0.3
356K	1253	embedded-hal	optional	^0.3
175K	47	smoltcp	optional	^0.3.8
35K	67	defmt-rtt		^0.3
101K	91	embassy-sync	optional	^0.3
86K	198	embedded-hal-async	optional	^0.3
77K	97	embedded-io-async	optional	^0.3
69K	34	serde-json-core	optional	^0.3
67K	22	uhlc	optional	^0.3.2
63K	74	embassy-futures	optional	^0.3
63K	113	fugit	optional	>=0.2.0, <0.4
52K	98	embassy-time	optional	^0.3
43K	117	usb-device	optional	^0.3
42K	14	embassy-embedded-hal	optional	^0.3
40K	16	arbitrary-int	optional	^0.3.8
40K	174	embedded-graphics	optional	^0.3.2
38K	56	embassy-executor	optional	^0.3
36K	69	embedded-graphics-core	optional	^0.3.2
34K	61	panic-probe	optional	^0.3
30K	10	embassy-usb-driver	optional	^0.3
26K	43	embedded-hal-bus	optional	^0.3
23K	22	esp-println	optional	^0.3.10
22K	43	display-interface	optional	^0.3
22K	7	embassy-net-driver	optional	^0.3
22K	20	esp-backtrace	optional	^0.3.10
22K	3	esp32s3	optional	^0.3.10
20K	14	esp-hal	optional	^0.3.10
18K	63	rtt-target	optional	^0.3.0
17K	2	esp-wifi-sys	optional	^0.3.10
17K	3	esp32s2	optional	^0.3.10
15K	23	embedded-svc	optional	^0.3
15K	6	esp-alloc	optional	^0.3.10
14K	15	stm32h7xx-hal	optional	>=0.2.0, <0.4
13K	5	embassy-hal-internal	optional	^0.3
13K	2	embassy-usb-synopsys-otg	optional	^0.3
13K	56	rp2040-hal	optional	>=0.2.0, <0.4
12K	5	esp32c3	optional	^0.3.10
12K	4	sntpc	optional	^0.3
11K	6	embassy-net-driver-channel	optional	^0.3
11K	14	embassy-usb	optional	^0.3
11K	3	esp32	optional	^0.3.10
10K	3	esp32c6	optional	^0.3.10
9.9K	7	embassy-net	optional	^0.3.8
9.8K	17	usbd-hid	optional	^0.3
9.5K	7	stm32-fmc	optional	^0.3
9.3K	2	bt-hci	optional	^0.3
9.2K	2	rp-pac	optional	^0.3.10
9.0K	3	esp32c2	optional	^0.3.10
8.8K	3	esp32h2	optional	^0.3.10
8.1K	30	panic-rtt-target	optional	^0.3.0
8.0K	11	embassy-rp	optional	^0.3
7.3K	3	rp235x-hal	optional	>=0.2.0, <0.4
7.2K	38	atsamd-hal	optional	^0.3.8
7.0K	2	stm32-metapac	optional	^0.3.0
6.2K	18	bxcan	optional	>=0.2.3, <0.4.0
6.0K	45	stm32f4xx-hal	optional	^0.3.5
5.8K	1	embedded-test	optional	^0.3.8
5.7K	18	embedded-sdmmc	optional	^0.3
5.2K	7	sequential-storage	optional	^0.3
5.1K	5	ieee802154	optional	>=0.2.0, <0.4
4.8K	1	esp-wifi	optional	^0.3.10
4.6K	17	bbqueue	optional	^0.3.0
4.6K	1	ieee80211	optional	^0.3.8
4.5K	3	mac-parser	optional	^0.3.8
4.2K	9	embassy-nrf	optional	^0.3
4.2K	7	lis3dh-async	optional	^0.3
1.1K	9	defmt-test		^0.3
3.7K	2	esp-hal-embassy	optional	^0.3.10
3.7K	11	embassy-stm32	optional	^0.3
3.6K		aht20-driver	optional	^0.3.6
2.8K	4	postcard-rpc	optional	^0.3.5
2.2K	3	nmea	optional	^0.3
550	1	defmt-logger-tcp		^0.3
550	1	braid-triggerbox-comms		^0.3.0
2.2K	7	esp-hal-common	optional	=0.3.5
2.2K	1	nrf-pac	optional	^0.3.10
2.0K	3	defmt-or-log	optional	^0.3.5
1.9K	1	esp32c6-lp	optional	^0.3.6
1.8K	6	rmodbus	optional	^0.3.0
1.7K	7	coap-message-utils	optional	^0.3
390		defmt-semihosting		^0.3
1.6K		json-lines	optional	^0.3
1.6K	1	stm32f4-staging	optional	^0.3.5
1.5K	5	error_set	optional	^0.3
1.4K	3	embedded-tls	optional	^0.3
1.4K	8	atat	optional	^0.3
270		hcsr04_async		^0.3.8
1.2K	1	cyw43	optional	^0.3
250		bmp390		^0.3.8
1.2K		cyw43-pio	optional	^0.3
240		cmsis-nn-rs		^0.3.10
1.2K	1	esp32s2-ulp	optional	^0.3.6
1.2K	1	esp32s3-ulp	optional	^0.3.6
1.1K	1	nourl	optional	^0.3
1.1K		mimxrt685s-pac	optional	^0.3.8
1.1K	1	tai-time	optional	^0.3
1.1K		stm32f1-staging	optional	^0.3.5
1.0K	1	err_trail	optional	^0.3
170	1	defmt-serial		^0.3
950	1	reqwless	optional	^0.3
950	6	eeprom24x	optional	^0.3.6
950	3	rtic-sync	optional	^0.3
140		defmt-brtt		^0.3
900	5	coap-message-implementations	optional	^0.3.8
900	2	imxrt-usbd	optional	^0.3
130		nosferatu		^0.3
900		serde-csv-core	optional	^0.3.4
850	6	device-driver	optional	^0.3
850	1	picoserve	optional	^0.3.6
100		am2301		^0.3
100		emc230x		^0.3.8
		ac4490		^0.3
		ad7124-rs		^0.3
		alkyn		^0.3.0
	1	ambiq-hal		^0.3
		aps490_pfpu2_mini		^0.3
	3	atsam4-hal		^0.3
		atwinc1500		^0.3.0
		bitbot_bsp		^0.3
	1	blue_hal		^0.2
		bmp280-rs		^0.3.5
		can2040		^0.3
		canopen_rust		^0.3.5
		cotton-w5500		>=0.3.2, <0.3.7
	1	defmt-bbq		^0.3
		defmt-log-test		^0.2.1
		defmt-ringbuf		^0.3
		elmar-mppt		^0.3.2
		embedded-devices		^0.3.8
		embedded-nrf24l01-async		^0.3
	1	embedded-registers		^0.3.8
	1	embedded-registers-derive		^0.3.8
		epd		^0.3
		esp-fast-serial		^0.3.8
		esp32-wroom-rp		^0.3
		ft6x06-rs		^0.3.8
		fusb302b		^0.3.5
		gc9a01		^0.3
		hmc5883-async		^0.3.2
		icm426xx		0.3.*
		iqs5xx		^0.3
		is31fl3743b		^0.3
		ism330dhcx		^0.3
		itla		^0.3
		jewel		^0.3.5
		loadstone		^0.2
		lp586x		^0.3
		microbit-clock		^0.3
		mini-slcan		^0.1.0
		mini-slcan-ng		0.3.*
		mnemos		^0.3.0
		nct3933		^0.3
	1	negicon-protocol		^0.3
		niva-components		^0.3
		nucleo-h743zi		^0.3.1
		ovl-atsamx7x-hal		^0.3.0
		pa-spl		^0.3.8
		phm-worker		^0.3.0
		pio-uart		^0.3.8
	1	printhor-hwi_mks_robin_nano		^0.3
	1	printhor-hwi_nucleo_64_arduino_cnc_hat		^0.3
	1	printhor-hwi_skr_mini_e3		^0.3
		robokit		^0.3
		rv3032		^0.3
		rv8803		^0.3
		sdmmc-spi		^0.3.2
		servo-pio		^0.3
		sharp-memory-display		^0.3.0
		steami-rs		^0.3.4
		threadx-rs		^0.3
		ublox-cellular-rs		^0.2
		ublox-short-range-rs		^0.2
	1	usb-pd		^0.3.5
		usbh		^0.3.5
		utrace		^0.3.6
750		ethercrab	optional	^0.3.5
750	7	lakers-shared	optional	^0.3
750	1	usbd-human-interface-device	optional	^0.3
750		lakers	optional	^0.3
		spi-memory-async		^0.3
		blues-notecard		^0.3
		icm20948_driver		^0.3.0
650	2	midi-types	optional	^0.3.2
650		rust-mqtt	optional	^0.3
650	8	stm32f3xx-hal	optional	>=0.2.3, <0.4.0
		manchester-code		^0.3.0
600	1	ethercrab-wire	optional	^0.3.5
		ds1302-drv		^0.3.8
600	3	embassy-boot	optional	^0.3
550		esp32p4	optional	^0.3.6
550		femtopb	optional	^0.3.8
		a7105		^0.3
	1	stm32-hal2		^0.3.4
		log-to-defmt		^0.3
	2	microbit-bsp		^0.3
		defmt-rtt-target		^0.3.0
		defmt-itm		^0.3
		lora-phy		^0.3
500	6	at-commands	optional	^0.3
500		ya-smoltcp	optional	^0.3
490	3	embedded-hal-compat	optional	^0.3.0
470		ms5803-14ba	optional	^0.3.10
450		stm32h5-staging	optional	^0.3.5
440		rmk	optional	^0.3
440	4	spacepackets	optional	^0.3
440		stm32g4-staging	optional	^0.3.5
390	1	embedded-nal-coap	optional	^0.3.8
390		usbpd	optional	^0.3.6
380		embassy-net-wiznet	optional	^0.3
370	2	qingke	optional	^0.3.8
340		bme280	optional	^0.3.5
330	2	nrf-softdevice	optional	^0.3
330		pac25	optional	^0.3.10
320		embassy-boot-rp	optional	^0.3
300	3	imxrt-log	optional	^0.3
290		stm32g0-staging	optional	^0.3.5
280		mpu6050-dmp	optional	^0.3
270	1	fans	optional	^0.3
270		sim7020	optional	^0.3
260		usbd-ethernet	optional	^0.3
250	1	vs1003-pac	optional	^0.3
250	6	esp-hal-smartled	optional	^0.3.10
240		synch	optional	^0.3
230	3	satrs-shared	optional	^0.3
210		stm32h5	optional	^0.3.5
200	1	ppproto	optional	^0.3.8
200		embassy-boot-nrf	optional	^0.3
190		embassy-net-ppp	optional	^0.3
190	1	musb	optional	^0.3
190	4	infrared	optional	^0.3
190	2	midi-convert	optional	^0.3.2
170		mcutie	optional	^0.3.10
150		py32-hal	optional	^0.3
150		embassy-net-adin1110	optional	^0.3
150	1	m-bus-parser	optional	^0.3.10
150		nrf-dfu-target	optional	^0.3
150		scd30-interface	optional	^0.3.8
150		embassy-net-enc28j60	optional	^0.3
150		embassy-net-esp-hosted	optional	^0.3
140		embedded-jsonrpc	optional	^0.3
140		py32f030_hal	optional	^0.3.2
140		libscd	optional	^0.3
140		stm32f3-staging	optional	^0.3.5
140		emc2101	optional	^0.3
130		gt911	optional	^0.3
130		tb6612fng	optional	^0.3
130		microscpi	optional	^0.3
130		nrf-modem	optional	^0.3
130		stm32f7-staging	optional	^0.3.5
120		embedded-sdmmc-dev	optional	^0.3
120		esp-ieee802154	optional	^0.3.10
120		iqs323-driver	optional	^0.3
120		py32f0xx-hal	optional	^0.3.8
110		ekv	optional	^0.3.2
110		vs1003-driver	optional	^0.3
100		llc-rs	optional	^0.3.8
100		tmp451	optional	^0.3
100		async-button	optional	^0.3.5
100		sifli-pac	optional	^0.3.10
		a121-rs	optional	^0.3
		adafruit-bluefruit-protocol	optional	^0.3
		adafruit-lcd-backpack	optional	^0.3
	1	adi-adxl355	optional	^0.3
		adi-adxl355-async	optional	^0.3
		aem10900	optional	^0.3
	1	aemics-stm32g4xx-hal	optional	^0.3.2
		bbqueue-sync	optional	^0.3.0
100		bcm2711-lpa	optional	^0.3.10
100		bcm2835-lpa	optional	^0.3.10
100		bcm2837-lpa	optional	^0.3.10
		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	byte-slab	optional	^0.3.0
		caprand	optional	^0.3
		cfdp-rs	optional	^0.3
	1	cody-c	optional	^0.3.6
	1	coordinate-frame	optional	^0.3.8
		cotton-usb-host-msc	optional	^0.3.10
		crsf	optional	^0.3.6
		cs1237	optional	^0.3
		dap-rs	optional	^0.3
		dcc-rs	optional	^0.3
		declare	optional	^0.3
		dfr0299	optional	^0.3
		dht-pio	optional	^0.3
		drogue-ajour-protocol	optional	^0.3
		drogue-tls	optional	^0.3
		drv8305	optional	~0.2
		ds4432	optional	^0.3
		dw3000-ng	optional	^0.3
		efm32pg1b-pac	optional	^0.3
		embassy-dht-sensor	optional	^0.3
	2	embassy-traits	optional	^0.2.0
		embedded-ads1220	optional	^0.3.8
		embedded-audio	optional	^0.3
		embedded-bacnet	optional	^0.3.5
		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
		errore	optional	^0.3.8
		es-wifi-driver	optional	^0.3
		fdc1004	optional	^0.3.8
		fh101rf	optional	^0.3
		ft6236	optional	^0.3.4
		fundamentum-edge-mcu-http-client	optional	^0.3
		fusion-imu	optional	^0.3.8
		ghostfat	optional	^0.3.1
		heapless_topo	optional	>=0.2.0, <0.4
	1	hftwo	optional	^0.3
	3	hid-io-protocol	optional	^0.3
		hts221-async	optional	^0.3
		hub75-remastered	optional	^0.3.6
		husb238	optional	^0.3.3
		ina260-async	optional	^0.3.2
		is25lp064a	optional	^0.3
		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
	3	lakers-ead-authz	optional	^0.3
		lis2dtw12	optional	^0.3
		lora-e5-bsp	optional	^0.3
		lsm303dlhc-ng	optional	^0.3.8
	1	lsm303dlhc-registers	optional	^0.3.8
		ltc690x	optional	^0.2.3
		m24c64-driver	optional	^0.3
		max145784-driver	optional	^0.3
		max14578e-driver	optional	^0.3
		max7219-async	optional	^0.3
		mcp2515	optional	^0.3.6
		mcp3424	optional	0.3.*
		mcp4725-async	optional	^0.3
		memory-lcd-spi	optional	^0.3.4
		mini-rxtx	optional	^0.3.1
		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
	1	mqttrust_core	optional	^0.3
		n32g4xx-hal	optional	^0.3.5
		nau88c22	optional	^0.3.5
		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	^0.3.10
		parse_rc_ibus	optional	^0.3.8
		pas-co2-rs	optional	^0.3
		pcf85063a	optional	^0.3
	2	phm-icd	optional	^0.3.0
		platform-switch	optional	^0.3
		pmsa003i	optional	^0.3.8
		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
		seeed-lora-e5-at-commands	optional	^0.3
		serial-sensors-proto	optional	^0.3.8
		set_of	optional	^0.3
	1	sh1107	optional	^0.3.2
		sht4x	optional	^0.3.2
		sht4x-ng	optional	^0.3.8
		sirena	optional	^0.3
		sitronix-touch	optional	^0.3.4
		smoltcp-rmodbus	optional	^0.3.6
		sn3193	optional	^0.3
		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
		stm32f469i-disc	optional	^0.3.4
		stm32g473-hal_oppe	optional	^0.3.0
	1	stm32g4xx-hal	optional	^0.3.2
		stratum-v1	optional	^0.3
	2	sunset	optional	^0.3
	1	sunset-embassy	optional	^0.3
		tca9555	optional	^0.3
		telit-me310g1	optional	^0.3
		tmp117	optional	^0.3
		typus_fugit	optional	>=0.2.0, <0.4
		ublox-sockets	optional	^0.3
	1	uftwo	optional	^0.3
		usb-dfu-target	optional	^0.3.0
		usbd-picotool-reset	optional	>=0.2.0, <0.4
		usbd-storage	optional	^0.3
	1	va416xx-hal	optional	^0.3
		vl53l4cd	optional	^0.3
		vlcb-defs	optional	^0.3
	1	w5500-tls	optional	^0.3.8
	3	wasefire-board-api	optional	^0.3.8
	1	wasefire-protocol-usb	optional	^0.3.8
		wasefire-scheduler	optional	^0.3.8
		wii-ext	optional	^0.3.0
		xpt2046	optional	^0.3.0
	1	ieee802_3_miim	optional	^0.3
		tm1637-embedded-hal	optional	^0.3.6
		l0g	optional	^0.3
		stm32h7-staging	optional	^0.3.5
	1	i2c-pio	optional	^0.3.0
		ector	optional	^0.3
	2	w5500-ll	optional	^0.3.8
	5	sixtyfps-corelib	optional	^0.3.0
	1	max116xx-10bit	optional	^0.3
		sx1262	optional	^0.3
	1	va108xx-hal	optional	^0.3
	5	w5500-hl	optional	^0.3.8
		satrs	optional	^0.3
		sx128x	optional	^0.3.2
		tinygif	optional	^0.3.4
		trenchcoat	optional	^0.3
		bno055	optional	^0.3
	2	bxcan-ng	optional	>=0.2.3, <0.4.0
	1	cotton-scsi	optional	^0.3.10
	1	cotton-usb-host	optional	^0.3.10
	3	dmx-rdm	optional	^0.3
		dmx-rdm-rp2040	optional	^0.3
		dot15d4	optional	^0.3
		embassy-boot-stm32	optional	^0.3
		embedded-hal-aht2x	optional	^0.3.10
		factbird-common	optional	^0.2
		hp203b	optional	^0.3.2
		i2c-character-display	optional	^0.3
	7	kll-core	optional	^0.3
	1	kll-hid	optional	^0.3
	3	lora-modulation	optional	^0
	1	lorawan	optional	^0.3
	1	lorawan-device	optional	^0.3
		lsm6ds3tr	optional	^0.3.5
	3	mantra-rust-macros	optional	^0.3.6
		max7797x-driver	optional	^0.3
	2	mqttrust	optional	^0.3
		nau7802-async	optional	^0.3
		neotron-bmc-protocol	optional	^0.3
	1	nobcd	optional	^0.3
		nucleo-wl55jc-bsp	optional	^0.3
		pid-lite	optional	^0.2
		radio-sx128x	optional	^0.3.5
	1	rotary-encoder-hal	optional	^0.1.2
	1	rpk-firmware	optional	^0.3
		rustot	optional	^0.3
		scd4x	optional	^0.3.0
		stm32-eth	optional	^0.3
		stm32wb-hci	optional	^0.3
	2	stm32wlxx-hal	optional	^0.3
		tlv320aic23	optional	=0.3.2
		w25q32jv	optional	^0.3
	2	w5500	optional	^0.3
		w5500-dhcp	optional	^0.3.8
		w5500-dns	optional	^0.3.8
		w5500-mqtt	optional	^0.3.8
		w5500-sntp	optional	^0.3.8
	11	wasefire-error	optional	^0.3.8
	6	wasefire-logger	optional	^0.3.8
67K	46	bitfield-struct	dev	^0.3
11K	15	rp-pico	dev	^0.3.5
8.7K	34	ssd1306	dev	^0.3.6
850	4	imxrt-hal	dev	^0.3
380		fielder	dev	^0.3.10
150		rp2040-flash	dev	^0.3.2
120	5	teensy4-bsp	dev	^0.3
120		metro_m4	dev	^0.3
120		feather_m0	dev	^0.3
		ad57xx	dev	^0.3.5
		adafruit-featherwing-oled128x64	dev	^0.3.2
		async-stm32f1xx	dev	^0.1
		cortex-m-microclock	dev	^0.3.4
		daisy	dev	^0.3.8
	1	dwm1001	dev	^0.3.0
		epd-spectra	dev	^0.3.6
		is31fl3193	dev	^0.3.2
		lpc546xx-hal	dev	^0.3.0
		persistent-buff	dev	^0.3
		pimoroni-plasma-2040	dev	^0.3.5
	1	pimoroni-servo2040	dev	^0.3.5
		pimoroni-tiny2040	dev	^0.3.5
		pimoroni_interstate75	dev	^0.3.8
		rucos-cortex-m	dev	^0.3
		sht25	dev	^0.3
		solderparty-rp2040-stamp-carrier	dev	^0.3
		sparkfun-micromod-rp2040	dev	^0.3.5
		ssd1331-async	dev	^0.3.8
		st7565	dev	^0.3.0
		stk8ba58	dev	^0.3.6
		oled_async	dev	^0.3
	1	jh71xx-hal	dev	^0.3